Hi henko,
a haven't seen any postings dealing with linux installation problems in the last months/year.
For the IDE its unzip'n'run (on Ubuntu at least) and the AVR tools are already installed from distribution repositories.
I don't really see a problem here that needs to be fixed and I can tell you it can be quite time-consuming to update, build, release and upload all the packages in their different package-formats.
The arduino-style distribution surly is the "Admins nightmare", but it seems to work for everyone.
Eberhard