I personally prefer a patch system too (if it's a packaging that I did myself and it's not a project that lives completely in bzr), but in this case it's a package we inherit from Debian. We had complaints from Debian developers before when the diff on merges.u.c they were looking at comprised not only of changes that were necessary, but also changes to the packaging. I'm not going to stop you from doing this, I'd just say: stick to whatever the Debian package does too.
I personally prefer a patch system too (if it's a packaging that I did myself and it's not a project that lives completely in bzr), but in this case it's a package we inherit from Debian. We had complaints from Debian developers before when the diff on merges.u.c they were looking at comprised not only of changes that were necessary, but also changes to the packaging. I'm not going to stop you from doing this, I'd just say: stick to whatever the Debian package does too.