I have been thinking of two things concerning the mapsystem in the game.
1. A map voting system after each round where you can vote for same map you played or any of the maps in the rotation on server.(look at COD) This function can be applied to gamemodes that supports it, like TDM CQ and DOM.
2. A timer in the server browser that shows how much time or tickets there is left in game. It happens alot of times i join a map i want to play and the round is almost over. Its a bit annoying.