It would be cool if features such as escorting the civis would be available.
Ex: Civi flys in a no-fly, you scramble the F-15s, meet up with said aircraft, wiggle them wings, and lead them out. Or they have a chance of not listening, or turning hostile (as hostile as civi airplanes can be) and you have to figure out what to do with them. :)
Sounds boring to some, but I would enjoy it.