Suggestions.
1st is a mod i think some other q2 games have done which is to combine trans66 and trans33 to make solid brushes with space where transparency is (like a chain link fence or floor grate) seems that this would be a fairly simple mod and would make for some nice effects when combined with clip/ladder brushes.
2nd is more bizarre and may never see the light of day...
Flares along with smoke and paint grens, great for maps like antioch and sandtrap where people camp in the shadows too much. It wouldnt throw balance off because only 1 person would have a flare at a time..
3rd. allow hud scaling to work in decimals instead of just integers
(ok i know this is silly too but I'm just brainstorming)
4th old school sprites, uni-directional and fixed angle for mappers (and animated)
OK im done
FTX