ENY is penalising people for playing the game, if there are more people playing (on one side) the planes get locked.
If people would be unlocking the planes for points it would be the opposite (they would be rewarded for playing).
So instead of locking planes with ENY, just perk the top rides (yak 3, p51, 190d, la7 etc you know the drill).
and if 2 sides will be made, the game instantly will be more enjoyable. (as with 2 sides there will not be a 20 vs 20 vs 8 scenario)