Couple of thoughts-
i think that it would be cool if there was a mode like the death card sticks and stones - Just everyone trying to knife each other.
People shouldnt use mp40 w double tap or juggy - wtf?
Campers should be kicked? If you dont choose a class for i think 30sec, it automatically kicks you. CAmpers stay in little spots for the entire game.
Artillery on small maps like dome shouldnt be allowed - whenever some gets it, they basically spawn kill for like 5 minutes, with dogs.
Maybe have separate bases, which have like armories, where you can grab more ammo and nades, but not the 1st perk.
And the final thing - you should be able to go where ever you want - i HATE the small barriers everywhere which stop you jumping from one point to the next.