About luck, the guns have a weapon damage range, for example, Barret, 1400-1500. The higher the luck, the more chance you will have 1500 damage instead of 1400. Another example, 7 Luck = 70% of a chance to give 1500 instead of 1400.
Assist points sound nice. For example, if we just halfway damage someone and another person finishes the guy, the person who halfway killed them should get 0.5 EXP and coins.
I got a few nice additions to "Items".
--> EXP Multiplier (for example, if you get a kill, you won't get one EXP point, you'll get 2 EXP points. (Price, 1000 coins 3 Cash
--> Coin Multiplier (Same as EXP multiplier, but 5 cash, no coins. (you don't have to pay coins because, why buy this coin multiplier when you have to buy it with coins?)
These should all last for 3 in game hours. the 3 game hours will only last when you play the game. It won't count down when your not playing.
Ideas, CTF, Spectator Mode, Change Teams, P button for in game menu, and show who you killed (for example, on the bottom it would say You killed DirectorD.