Well it's come to my attention that some people still think the arena is a win button for the rich players and for those who are in guild which have hundreds of expensive sets and epics. To be honest, some of this is true, especially at lower levels considering there are VERY low chances of winning a low level (epic-allowing) tournaments without an epic. There are too many low level epics now anyway.
My idea is to introduce a part of the arena that does NOT allow Legendary/Super Elite/Crystalline/Epic items. Only Common/Rare/Unique. I think this would give more people the chance to think about skill in the arena rather than "what set is most efficient for this level.. OH it's too expensive never mind". I can't really see a down side to this. More use for common/rare/unique items so not everything will be thrown into composing. It will get more people involved as they wouldn't need to have sets worth hundreds of fsps just to stand a chance of winning. And more people involved means more gold sinking, more arena items available, more arena activity.