In this respect the old IL2 provided the numbers of spawned planes per airfield. Was not so bad if one was sensible to the balance issue. However forcing ppl to balance is not such a good idea as there are ppl that just fly one side or want to fly a specific aircraft.

Autobalance is no problem when on each side there are the same planes ... but who would want that?

EDIT: On the server-set windows I voted that some should be server-set. With that I mean that some windows that may be considered by the server providers as unrealistic or providing some with advantages may be forced off and others on. When exiting the server the player's preset window configuration should be restored for offline or for other servers that don't turn off these windows. Positions as configurated by the player should be maintained. I think this is not so difficult to implement.