A single GV can flash a base or a single plane for that matter and the circle would have to be small enough to keep it from being too vague of information but that would keep from being able to respond in any manner. Most large air battles of WWII were controlled fights, at least western fronts, most definitely ones that involved important strategic targets or homeland defense. I think BarDar only, no dots anywhere, would be far closer to realism than what we have now and at the same time a great enhancement to game play.
In my opinion of course. <S>