I do have posted a ticket about both side use wrong ADI system in http://feedback.arma3.com/view.php?id=9863;
But, this one is slightly different and more crucial.
I'd to say, The ArmA3's AH SYSTEM is still READABLE, if you know how it works. But why you have to use one that not exsit in the world? And for a pilot who used to EAST AH system, he/she will make mistake with this one.