Game mode maps should be smaller, more simplified, and it is ok to have a lower player count. Slayer isn't that great and needs an overhaul. Modter terrains are good, but people don't use them well. Not all buildings should be enterable, but only if it is absolutely needed. More vehicles should use a third person view just strafortress' spitfire. Bot's should be used more in game modes. If a player can't build, don't bother trying to make a map for a game mode. Practice until you get better. Conflicting styles of tools, weapon are garbage. (Randomizer is "somewhat" of an exception).