Although I am not the maintainer of this package, I assume this is not a trivial change due to the fact that one need to split the binary-package into two packages: rdesktop and rdesktop-smartcard. I think most people will not use smartcard support and do not want rdesktop-smartcard because of the extra dependency to pcsc.
I filed a bug in the Debian bug-tracker.
Although I am not the maintainer of this package, I assume this is not a trivial change due to the fact that one need to split the binary-package into two packages: rdesktop and rdesktop-smartcard. I think most people will not use smartcard support and do not want rdesktop-smartcard because of the extra dependency to pcsc.