"What I meant about RR in the MA is, no historical footpath, ie, Spits shooting spits down, and 1939 planes in with 1945 planes. Nothing to do with FM mind you."
That's what I'm trying to tell you--that's exactly how it always was in FR too. There were of course "axis vs allied" 2-sided arenas available to both FR and RR although they were less popular. AW's system didn't NEED the "best of both worlds"--it just had both worlds in full

"it was nice to have a choice, and always have population in those arena's, I'm afraid that in AH today, most would be empty, and most in the MA."
AW's arenas were limited at considerably less than 550 people. The fact that the AH MA is capable of supporting the entire nightly player base of AH is what kills alternate arenas. Arenas in AW were added/removed as demand shifted. For example, when the first "axis versus allied" arena opened, there were THREE of the regular "european" arenas (the equal of the AH MA) as well as a "pacific" arena (also similar to the AH MA), and a "fighter-only" arena.
Basically everyone could fly in the environment they wanted to. Plus, if an arena had to down for maintanence, it didn't affect the entire player base like closing the MA in AH does.
J_A_B