Howdy,
I was flying in the AvA Monday Madness the other day. IMO, having selected planes by year fight each other on each side really makes for much better fights. One of the problems I came across is that players just get into KI43s and A6Ms so that they can outurn every plane and gang at will in their easy turn planes. Also, I think being able for everyone to fly the same planes takes away from the "AvA" experience. My belief is that planes built in the same year have similar advantages, which makes for more, how do I say, structurally fair fights. Also, if it's AvA, it provides a more realistic concept. I just think that everyone hopping into the best turny birds takes away from the fun of it being fairly competitive.