AM has the arm strength, but he has a difficult time putting the proper arc on passes that need it. I don't know if he ever played baseball, but a lot of pitchers with great arm strength can nail all of their throws, but at every level short of the NFL, a lot of times their receivers can't catch the ball. AM has a bit of "the yips" with those throws. If you're old enough to remember Chuck Knoblauch being incapable of throwing a ball accurately to 1st base from 30' away, he often did fine when he barely had enough time and just had to use muscle memory and instinct, but he almost always choked when he had time to think about it before throwing to first. It's often the same with good QBs when they need to throw touch-passes, like Swing Passes, screens, and deep fly patterns. It compounded the problem that AM was often throwing to short WRs who had a relatively limited catch-radius.
If AM has a strong O-line and running game to carry the bulk of the load, and he has time to throw, he'll be a different QB. He might still struggle with the yips on those touch-passes though. He will at least have a lot of larger targets, and a little success early can go a long way.