All that needs to happen is for friendly aircraft to have the same icon limitations as hostile aircraft. That alone will end all casual "drag the guy on my tail to the friendly AA vehicle" escapes.
Setting a 1000 yard vis range on AA vehicle icons will do essentially nothing. At 350mph in a fighter like an Fw190D-9 or P-51D you will still be well into the Whirby's kill envelope by the time you significantly alter your flight path if you see him 1000 yards ahead. Further, if you are chasing an enemy that enemy would still have six times your vis range, only a slight reduction in advantage from the ten times vis range that he has now.
Just set all vehicles to have a 600 yard icon vis range to aircraft, both friendly and hostile, when stopped and a 1200 yard icon vis range to aircraft, friendly and hostile, when moving, 1200 while stopped and 2400 while moving for friendly and hostile Fi156s. GV icon range for GVs would remain as now, no icons for enemy GVs and 6000 yards for friendly GVs. GVs would maintain their 6000 yard icon range for friendly and hostile aircraft as well, aircraft being much easier to see from the ground that GVs from the air.