Yes that is my strategy as well. I would like to see more enhancements in the future to nullify this (more nests of anti-aircraft batteries, new mobile weapons that are more effective against fighters). That way you would be forced to utilise ground and air forces together. Or perhaps areas where you could not use air power at all.
Running in parallel with this, it would also be nice if there were cliffs/hills that could only be negotiated by marines (no tanks etc).
All in all though it is a great game it just needs the air forces wings clipped !