>Of course, because they all install texlive full scheme, so everything.
Also, I'm not sure if this is related, but full scheme is far from necessary for manual install. In fact, from recent googling, there is even a new script popped up for "installing packages on the fly" while compiling a .tex file ( http://www.latex-community.org/forum/viewtopic.php?f=12&t=15194 )!
What I'm saying is, I think there are good solutions (even manual ones like I was doing previously, though I think I'll use the script from now on) for the individual user involving your tlmgr program rather than deb packaging of individual elements. For large, multiuser installations, it may not be inappropriate to have them install everything. I think this would justify the split between 1) and 2) as I have above, especially if the split means you can get out new releases much faster!