DiabloFans

Well for starters I'm sure there will be leaderboards and ranking for every bracket they implement. Otherwise, unless you're doing 3v3, you could get put in matches with people way above/below your skill level. And they've readily stated that PvP in general won't be as balanced as PvE simply because of the amount of builds and because its not the main focus of the game. So chances are that even 3v3 won't be balanced (at least for a while).