Sparow,
I agree wholeheartedly, but something we have to consider is the amount of playability those early-to-mid-war aircraft would provide.
When I log in, I go looking for the arena with the largest numbers. So far, it's always been a late-war arena. Most of those aircraft, P-35, P-36, Buffalo, I-16, I-15, I-153, are all hopelessly outclassed in the late-war arena, so chances are no one would use them.
Personally, I think Brewster Buffalos vs. Polikarpovs or early 109s would be great (Finland/Russia/Germany 1940-41), or P-36s vs. early 109s (France, 1940), or even Spanish Civil War, but all of those events put us in the minority of players in the game. If HTC is going to develop a new aircraft, I'm sure they want to select one that will be utilized by the majority of the players, not just a select few.
Don't get me wrong, I'm with ya on your choices. I'd love to see PZLs, IAR 80s, Mig-1, CR.42, Re2000, etc., but I doubt we're going to.
J