I like doing arenas for a mission, not only "adventuring" gates. To get the the arenas you will have to play on the arcade, but you still don't get to play arena that much and often have to wait for the arena to appear as an option on the elevator screen. A arena mission added to the Prestige would most likely satisfy me and I'm sure many other players!
But can you even glimpse the consequences of that many ammount of treasure boxes only waiting for us behind every room of a prestige arena?
...magnificent and terrifying consequences :P
"It's raining orbs, Halleluja it's raining orbs!"