I've already made a suggestion for the weapons and a votekick. But not for everybody. Make it so only VIP users can votekick, so that will GREATLY reduce the chance of it being abused to high-heaven by grievers.
I like the idea of some new weapons, the current ones seem a bit plain. Also get rid of smoke grenades, all they do is create and area of pure lag which you need a super computer to get around.
Imagine 3 friends joining the server having veto over everyone in the server. They would just make it a server for them alone, and if someone joins !votekick.