Originally Posted by Drysc, a blue poster on the US blizzard forums:
We've kept a lot in mind while creating the arena system to help make it as centered on player skill as possible, and not time invested. We're looking to help create a place where players can track their achievements and improvements in a fun PvP environment. We're no strangers to the tactics and extent at which players will take a game to help ensure they reach their goal sooner or easier. It can however be minimized by simplifying a system so that the possible benefits available to a player are specific and tangible to everyone, and that the potential for exploitation is reduced as much as possible. With a complex system there will always be that something extra that can give you an edge over someone else, it's the size and availability of the edge that makes the difference though. We think we're making some great progress in creating place where players can come and test their PvP skill against others, have fun, and get some pretty cool rewards out of it too.