This game is called Mechwarrior, not Aerospace Jockey
To be honest, some developers tried in cooperate player controlled Aircraft in massive Multiplayer Shooters.
Battlefield 1942 did it AFIAK first, and... well it worked, but with a lot of problems from balancing to small maps for real fast fighters.
While I would like to see AI controlled Tanks and Infantery in MWO, and i don't dislike the Airstrikes I don't believe this game should have other player controlled units besides Mechs. Keep it to the core.
But if you like Aerospace Fighters:
Mechwarrior Living Legends, a Mechwarrior Mod for Crysis Wars have them.
And some guy is working at a Aerotech Mod for the Freespace 2 Engine - just Fighters, Dropships and Warships, no Mechs and Ground Combat - look at Hard-light.net for it.