Guys, I hate to say this, but I don't think it will ever work. I'm all with the guys that want to see the early war planes, I really am. I flew the 109E4 a lot this past tour. The 109E4 is about as uncompetitive a plane as we have in AH. That said, I still had a good time flying it (for the most part). Now THAT said, I don't think many people would. I also don't think many people would enjoy flying the C202, Spit I, Hurri I, P40 (if it ever gets introduced), or ANY plane that isn't 1944 or up. The Spit IX is an exception, because it is very well suited to 'mixing it up' with great guns, turning, and acceleration. The SpitV is also an exception, but just because the most popular plane in the game is the Spit IX and the Spit V outturns it while retaining marginally worse acceleration and the same guns.
The 109E4 almost turns with the Spit IX, it is slower, rolls much worse, accelerates worse, climbs worse, and has about half the firepower.
The Spit I is slower than the Spit IX, turns better, rolls worse, accelerates worse, climbs worse, and has maybe 1/10th the firepower.
The Hurri I stacks up the same as the Spit I.
The P40 would stack up the same as the 109E4.
It isn't the 1944 'speed demons' that make it hard for the early war planes to compete, guys. It is the 'jack of all trades' 1942 Spit IX. That said, the guys flying the 1944-45 planes fly them so they can GET AWAY from the Spit IXs, not fight them. We've got a reasonable 'balance of power' in the MA now between the late war planes and the early/mid-war planes (Spit IX and V). The other early war planes don't have a place in the arena as it is, and trying to force people to fly them will just make them mad and cause them to leave, not 'diversify' the arena.
If you want the arena to be 'diverse', you have to do it yourself. Fly one of the 'hangar queens' once in a while, instead of complaining that nobody flies them.