I know this sounds weird, and it's a long shot. Yet too many people in "8 Player" complain about not knowing which games are playing. And they don't want to give up their spot in the current arena just incase everything else out there is much more boring than what they are playing.
So, I suggest HTC makes a new option on the clipboard named "Scan Arenas". It opens a new window, almost the same as the roster. And it scans the "8-Player" lobby for which games are playing. The users would not be able to join the game from the arena istelf, it would just give them a window to see what's going on.
Here's an example I made:

Forgive the low editing technique, I use MS Paint.