I have started playing ZombiesV and I quite like it. But an issue I continuously face is players who bosshop arenas. These players have good swords for killing bosses so they can kill them quickly. And what these players do is sit in the lobby and watch the join game GUI until someone is just about to get a boss wave then they jump into the arena and kill the boss then leave. And its so very annoying for players like me who join empty arenas to solo the waves to spend 20 or so minutes getting to a boss level only to get a player jump in and kill the boss with their OP sword then leave. My suggestion is that arenas should be locked so that no one can enter them when wave 5 (or there about) starts and after that no more players can join just to bosshop your game.