I know this is somewhat generic, but a "Newly created" and "Tried and tested" category might suffice. It seems like most of the moaning I see is folks having to wade through a ton of bad compilations to find a few good ones. the groups could perhaps be based on number of downloads, rating, etc. I, and quite a few others, persoanlly like checking out new compilations for inspiration and to discover great, lesser-used, mods...so I don't think the former category would really prevent new compilations from seeing the light of day, it would just really assist those folks who maybe don't know as much as others and don't want to spend a crap-ton of time sorting through compilation after compilation.
Barring that idea, organizaed by resolution support would also be helpful. Not many things more irritating then setting up a compilation only to realize it doesn't fit your screen
Most authors are good about stating this up front; this would be another "help the newbie compilation downloader" category