Its my experience that a RPS does the exact opposite of what most of you want. It actually brings less diversity to the arena.
What happens is that during each "period" you see mostly the one best TnB plane, and the one best BnZ plane, and hardly anything else. At least thats the way WB's was with their RPS.
And a note of importance concerning a RPS and all the whines about the N1K2. Yes, the N1K2-J wasn't introduced until very early in 45.
But the N1K1-J was operational in late 43 (I can get the exact dates when I get home to my books). And performance wise, the N1K1-J was only about 5 mph slower than the N1K2-J, a very little slower in climb, but otherwise you wouldn't notice alot of difference in the two in regards to gameplay in AH.
The N1K1-J would absolutely dominate a midwar portion of the RPS. And would be a obvious varient to an existing aircraft, to flesh out any RPS.
PS: Isn't it funny that the N1K2 is relatively rare in the arena now since 1.08, but its performance is barely changed? Its all about rumor, perception, attitudes, and "I heard the XXX plane is best on the BBS".