I'll chime in with my two cents worth, and maybe offer HT some food for thought.......
I was against the reduced icon range to spot GV's even back in AH2, but I went along with it for a while, then real life took me away from the game for a couple years.
I did some GV stuff back then, and do it every once in a while now that I am back.
What if:
For AA GV's (M16, Wirbs, and Osties) the icon range was extended, and made equidistant? If not 6K like it was for so long in AH2, then how about 3K, with the condition that the AA units cannot ID enemy planes for that same distance? After all, their purpose was to engage enemy aircraft, to even the playing field a bit.
Other armored GV's, the tanks, set it to 1.5 or 2K. All they have for AA defense is a pintle mounted MG, so they could use a bit of help in evading detection.
Jeeps, M3's, 251's etc, and "thin skinned" vehicles icon range set to 1K or below. They are helpless against even MG fire, and could use even more help in evasion and escape.
Dunno if it would be a nightmare for HT to code, or if it would even be possible, but it would make sense to even things up for the AA units vs the enemy aircraft.
Again, just my thoughts on the matter........