Slow down the cannon speeds, it's too OP if someone can shoot every wall in less than 2 seconds or that. Limit the speed of cannons to 3-4 seconds per shot. The reason why fast cannons are too OP is because a person patching can't keep up and the pvping going on makes it harder. Think about how fast it is to get into a base, under 5 minutes or less with no interruptions. If someone gets on, there getting targeted and no one can stop it.