1. CPP is nice, CPP that can transform into a weaker sniper rifle is even better! Kinda like that pistol Turok: Evolution. Like, have the pistol in its Sniper form have a zoom alt-fire instead of a automatic alt-fire. Also, the CPP needs more ammo...
2. There is this bug with the weapon cycling when you play Chaos UT2. I always get stuck on the Melee weapons. Probably a dozen people alraedy posted about this, but maybe you could just have the melee weapons replace the default melee weapon, and not force 3rd person. Also, it would be cool if you could block bullets with the melee weapons just like the Scaarj do in Unreal 2.
3. The crossbow is kind of weak. I compared it to the Shock rifle in usability, and overall the shockrifle has more killing power and is easier to handle. Maybe increasing the Bolt speed would help. Speaking of which...
4. Could you bring back the needler?!

5. For some reason I can fall faster than the grenades when I'm playing in Low Gravity. I think this is more of a problem with the game than the mod. But if it's fixable that would be cool.
6. Could you make Chaos Onslaught? That would rock, especially since that Chaos Rocket launcher could easily replace the AVRIL.
7. Chaos Particle Projection Cannon! Primary fire shoots small bouncy explosive balls that look like little ascended Prox. Mines. Kinda like how the protoss can turn into avatars if they merge together. Alt. Fire lets you charge up the bouncy balls! And you can make them sticky balls of plasma too, so if you want to make people bombs you just shoot em with a lot of them.