watching arena fights

Hey all i was just wondering why this game doesnt have a option for people to watch arena fights the game i used to play (city of heros) if there was a arena fight there used to be a option that you could go in and watch.
Personally i think a arena camera or something like that where other players can watch you fighting (they will be invisable and not able to communicate with whoever's in the arena) would benift as you might learn some new tricks that would help them become a better pvper