I recommend you switch back to a forest theme, because it's a lot more fun that way, and reduces needed skins. You can do that, or use a ravaged city, which I can terrain on request. PLEASE!!! switch back to the old system, and I will help you do a couple little things to make it awesome and more like CS. I just got it and know how I can twist the engine to make it work better.
I dont know if it has already been posted but what about a "like-resident-evil" mode with different waves of units attacking and you are supposed to be in a team. The units should grow stronger each level. Game is over when all are dead or when they have defeated all (about 10) levels.
Will probably be added in the next release, not in the 2.0 though due to lack of time. Im gonna play WoW alot when its released, so im trying to get this version out before.