how about in tower only, but with a sort of GCI instead?
what i mean by that is, while in flight you have no bar or dot radar....you only have an an arrow (like the off map flyer arrow) that points in the direction of the closest or largest group of enemy contacts. you could still get info from country mates in the tower as to wich area has the largest concentration of enemies.and you would still have that "fog of war TM" effect while flying, you wouldn't be able to open the clipboard and see wether or not that high con at 3 was friendly or enemy.
just my opinion for what it's worth