Depends on where you draw the line at I suppose Ack-Ack.
Spitfire IX and N1K2 make quite a few planes worthless. 109G2,G6,F4,E4,c202 & 205,P40E and B,190A5 and A8,F4F & FM2,Spitfire I, Hurricane I, A6M2 & a6m5 (imo), 110C4 (and 110G2 imo), all the P-47s, arguably the P-38.
Do some of them see use? Of course they do. Will they ever be popular? Of course not. Why? Because the performance of the planes offer no advantage over the Spit IX and N1K2, which is the 'baseline' performance for our MA. The Spit IX and N1K2 dominate all of the planes in the list above, so for your average Ma 'pilot' there is no point in picking those planes when if you want good turning you can fly the Spit and N1K, which offer other important advantages also.
For example, lets compare the 190A5 to the N1K2.
Speed: From 0-10k, the 190A5 has a *very* slight edge in level speed.
Acceleration: N1K2, hands down.
Turning: N1K2, hands down.
Climbrate: N1K2, hands down.
Firepower: N1K2, hands down.
Roll Rate: 190A5.
So... what reason would anyone have for flying the 190A5? The only reason is because they like the plane for some reason that has nothing to do with performance. Well, and they are willing to accept the fact that the Top 5 planes will be able to dominate them in a 1v1 fight.
We could also compare say the Spit IX to the 109F. Spit V is actually a 'historical' matchup", but our MA is just that, an MA.
So-
Top speed: 0-10k, similar, with the Spitfire gaining an edge the higher you go. Above 10k, the Spit IX hands down.
Climb rate: Spit IX, hands down.
Acceleration: Spit IX, hands down.
Turning: Spit IX, hands down.
Roll rate: Spit IX.
Firepower: Spit IX, hands down.
Its quite clear, to me anyway, why the popular planes are popular. The Spit and N1K because they can turn and have heavy firepower, and the P-51D and La7 because you can run away from and or BnZzzzz Spits and N1Ks (plus any of the above planes in the first paragraph). The Spits and the N1K2 are popular because they ARE the best 'fighting' planes available in the MA. The P-51D and the La7 are popular because they are the best runners in the MA.
So, in essense, a Spit IX may as well be a 262 to a 109E4 or F4. The only difference is it dominates the 109 totally, instead of just being much faster.
I think the Me262 would undoubtedly be the most popular plane in the arena if it were unperked. It would make the game not very fun at all for the majority of players. The only difference between the situation we have now is that a minority are unhappy with our 'baseline' instead of a majority.