I do not believe that the Grand Arena in Luna should be a pvp arena anyways. It was never intended to be. The arena in Luna is a Bagball field. Makes it tough to start up a game of Bagball when pvp'ers can crash the party at any moment. There are plenty of pvp arenas that were built for the sole purpose of pvp. Lets get it out of the Bagball arena.
Bagball is coming to the shard, folks. Get ready. It is a hell of a sport. 
Your Fellow Evolutionite,
Lord Soronume