Plane-based strikes would ideally be tied to an actual plane unit you'd have to buy - it would be housed off-map, you wouldn't have direct control over it and you would still have to call in the ability the same way you do now but it would be less of a munitions cost and cooldown with the obvious risk of your plane getting shot down by AA and having to buy another.
Men of War 2 is pretty neat in that its plane callins are all tied to airplane units that you put into your army before the game begins.
As long as the plane isn't shot down, you can keep using it (although planes have a 5 minute cooldown to be used again, if you have multiple planes, you can use them sooner). There are also no loiters.
No plane vet though.