Just something I have been toying around with for fun is a different freezetag concept since I have been thinking of doing some character mesh work as learning experiences, so to speak. Cant add much of anything to ow2.
The idea is to take out all the killstreaks even the stock ones. There would be an automatic uav for all players every so often. So when you see them they can see you. No stealth perk so everybody is visible when its active. Nades and rockets (maybe) but no mines or c4. Location modifiers so you cannot freeze people with one shot to the foot. It would still have the minigun for example, available in a standard loadout with a pistol, but with a big movement penalty since its so heavy. Pretty much a straight combat game.
This would allow me to remove a large number of custom models and materials and free up assets for weapons and characters. Much will depend on how many people would play freezetag with no streaks at all. Or these days are there too many players that just wont without them. If there is no RC will they even bother. G13 still has the airstrikes and helis I believe. Sounds kinda retro like in the ut2k4 freezetag mod.