Yes, Henry, flipped counters are already used, but only for neutralized worlds (and possibly outposts and/or PDUs). Naval units, however, don't flip, they invert (or they can, it amounts to the same thing), which would leave a system where ground-based units would be known but naval wouldn't.
I never said fighters shouldn't be built to the limit of the counter mix. What I was saying is that there are not sufficient fighters to replace every PDU with ten of the little buggers.
Personally, I'd rather have my fighters as an offensive arm as opposed to sitting waiting to die (though I've been forced to resort to that when things got dicey).