Two suggestions/questions/whatever.
1) Are hitboxes possible? I figure the problem would be the lack of CSQC, but I figure I'd ask for an exact answer. I think hitboxes would add a new degree of strategy to the game.
2) How hard would it be to add a melee weapon to the game? Maybe not to replace anything else, but possibly as a mutator (like UT's Chainsaw Melee, except just having a melee weapon replace the laser). The laser is nice and all but it really doesn't give the satisfaction that melee weapons do when you pull off a kill with them.