lintian has a bit to say about this (used disco just to test):

pulseeffects_4.6.3-1~disco1.dsc
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 10)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 12)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 23)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 25)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 29)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 31)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 43)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 45)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 49)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 51)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 55)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 57)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 61)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 63)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 68)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 70)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 74)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 76)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 80)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 82)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 86)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 88)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 92)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 94)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 98)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 100)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 104)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 106)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 110)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 112)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 118)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 126)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 128)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 132)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 134)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 138)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 144)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 146)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 152)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 159)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 161)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 165)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 167)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 173)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 175)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 180)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 181)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 186)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 187)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 193)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 194)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 200)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 201)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 202)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 208)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 209)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 210)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 214)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 215)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 222)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 223)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 224)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 228)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 229)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 230)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 235)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 236)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 237)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 241)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 242)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 243)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 247)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 248)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 249)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 254)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 255)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 256)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 260)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 261)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 262)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 269)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 270)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 271)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 275)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 276)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 277)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 281)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 282)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 283)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 287)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 288)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 289)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 293)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 294)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 295)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 299)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 300)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 301)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 305)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 313)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 315)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 319)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 320)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 325)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 326)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 331)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 332)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 337)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 338)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 344)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 345)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 350)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 351)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 352)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 356)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 357)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 358)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 363)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 364)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 370)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 371)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 376)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 377)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 382)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 383)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 388)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 394)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 395)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 400)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 401)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 406)
P: pulseeffects source: file-contains-trailing-whitespace debian/changelog (line 412)
P: pulseeffects source: file-contains-trailing-whitespace debian/control (line 64)
P: pulseeffects source: file-contains-trailing-whitespace debian/control (line 73)
P: pulseeffects source: file-contains-trailing-whitespace debian/control (line 82)
P: pulseeffects source: source-contains-empty-directory debian/source/
W: pulseeffects source: missing-debian-source-format
W: pulseeffects source: hyphen-in-native-debian-changelog-version 4.6.3-1~disco1
W: pulseeffects source: debian-watch-file-in-native-package

gstreamer1.0-convolver-pulseeffects_4.6.3-1~disco1_amd64.deb 
N: 0 tags overridden; 1 unused override


Other than those items (mostly whitespace in the changelog & control files), looks fairly clean. Probably need to change debian/source/format to 3.0 (quilt) to remove the "debian-watch-file-in-native-package" warning.