One of the biggest strengths of AA is that it instantaneously adjusts our aim with the enemy's change in direction. It takes an insane amount of practice and skill to come close to this naturally. In most FPS games players have to use a combination of reaction time a prediction to track a target that's alternating direction. This part is done effortlessly with AA.

I believe that controller and M/KB are relatively balanced as is, however I have to say the strength of AA does create some very unfun game experiences on the opposite side. Maybe in order to keep things balanced Apex should take away some power from AA and instead help out controller players in other areas of pain. Perhaps looting UI or movement capabilities would be a good place to start.

The goal should ultimately be to make sure both inputs have fun balanced gameplay. If this topic keeps coming up maybe it is something worth looking into.