An RPS in the MAs, IMO, would virtually guarantee the success of the horde, while limiting the chances of the underdog to up cheap tempests and jets, or the late war dragsters that are popular for hunting goons and NOE mishunz. I fly only the dweeb rides, and usually (not always) for the underdog side, so I'm kind of biased, mind you.
Forcing everyone out of whatever rides is already accomplished in part by ENY, and look at the shrieking when that happens.
Those 2 things come to mind immediately when I think RPS, and along with being an unpleasant surprise to those who don't fly every night, I just don't think it would add anything to the game.