Replace the ammo/fuel dumps & barracks at the airfields with each a set of factories/depots around (pretty close) it from which it would be dependant.
A- Suicide tiffie raids would be less effective (takes longer to bring down 5 large depots/dumps than 5/10 small tgts on a flield)
B- Gives Buffs a target to hit, that has an effect (they have to hit a large tgt, not sparse small tgts)
C- Gives ground vehicles a lot of citylike features to fight in.
Just an idea, of course...