Hmmm... Maybe we've been stuck on Field Capture ("Capture the Flag") strat for too long, here are some alternate resets (mix and match):
"Cinderella at Midnight" -- All the planes on the losing side instantly turn into C-47s. Fields reset (randomly or otherwise) when the last goon is downed. Variation: planes stay the same, but get B-26 structural limitations (esp. Vert. Stab.).
"The Hammer of Vengeance" -- Victorious teams A/C get B17 gunner capability and unltd. ammo. Reset 5 minutes later.
"Cakewalk" or "Musical Chairs" Immediate RTB is called by System. Acks disable. After all the planes of one country (Cakewalk) or of two (Musical Chairs) land, the fields reset and a divine wind sweeps in, shredding all those still in the air.
"The Winds of War": Reset, and 100 kt winds blow to victorious side for 10 min. Helps winners RTB, and losers bring bombers/vulch teams over enemy.