It works like this, Steven. If the purpose of RPS is to give people a realistic opportunity to fly planes that are totally outclassed by latewar rides and to increase the variety of planes seen, it seems on the surface to be an excellent idea. The trouble is, and no matter which way you do the arena (MA, Allied vs. Axis) there will be a perceived "best plane" and people will gravitate to it. A common complaint we have now is that people fly Spits, Nikkis, and La7s. RPS doesn't solve this tendency in people, it merely switches out the characters.
The King is dead, Long Live The King!
See what Wotan is talking about? The sky will still be filled predominantly with , and in essence the RPS will have failed to accomplish its purpose.