One of the few things I greatly miss from WoW (Yes yes, WoW is the devil incarnate, but not everything it did was bad) was the Brawlers Guild. In short, its the Bozja duels, but each player had a progression of fights and would queue up in the arena. People could crowd around and watch the fights as well.

Sadly the Bozja duels only allow 1 fight and done, randomly appear. But putting the Gladiator Arena to use, could just queue up for a fight, and you get to watch other players fight while waiting.

It just makes me sad we have an whole arena just sitting there, practically unused (Even by the job quest).