What you are suggesting is the Rolling Plane Set (RPS) and it too has been suggested ad nauseum.
With the increased arena limits, my opinion is that the game is now more versitile for the masses. The type of play desired for each player is available based the arena he/she chooses. The change has prompted less chest thumping and trash talking on 200; and, while I didn't initially like the changes, has improved the overall quality of the game.