If wine-c is stored uncompressed, it's easier for a site admin to modify it for all its users.
True, but this shouldn't be necessary. Also any global configuration should be done via winecfg.
Also, there are a couple places in Wine which are dependant on how the underlying distribution is setup, things like menu entries and such. Not every distro ship a vanilla Gnome or KDE (and then there are many versions of each).
Sure, after all I ship mime types files and menu entries for the mandrake menu system in mdk rpms, but I'm reluctant to change the actual application source code, because the same source should work for all (After all that's why we use autoconf), so if any changes are needed, they should go in the CVS, and consequentially end up in all packages
Ivan.