Just kicking an idea around.  EW and MW get minimal use with the player numbers we have .  How about if there was only one MA, and when the maps rotate, it also rotates EW, MW, LW.  
Would players be unhappy that they can't up a  D Pony?
Would flying a limited set spark some more interest in trying new planes?
Is it too much of a change for guys that work on different arena scores?
Would it help or hurt numbers?