The way I see it, the AH and the MAA should have equally matched weapons systems, and it's the vigilance of the systems operators which should make or break, it should be see first, kill first, make a mistake first, die first.
Neither vehicle should possess greater optic zoom, nor greater lock-on range.
As it stands now, the MAA has greater zoom and lock-on range. AH's have to go deep into enemy territory to kill a camping MAA.
Ground troops can exit and repair, they can setup up autonomous MP-APS and AA mines.
MAAs have to deal with ground threats in addition to more types of air threats than just attack helis.
Frankly, I wind up dealing with infantry more than air when using an MAA.