I wanted to "Spectate" and watch everyone in the arena fight. But sadly, there is no way to see the action behind a Iron Block wall... I'm suggesting making a floor underneath and above the PVP rooms with glass to see. This would also help users to know what they are walking into, and know what to expect, before just walking into a death trap. Also, the portal is set up so people can push people into the arena from /spawn. I suggest putting the portal on the PVP side back a few blocks, and adding something people need to jump over, like just about any block. This would prevent people losing their stuff from AFK'ing in spawn.