Agree.
I also think "drops" in the NFL have a lot to do with anticipation and timing. Knox could probably catch 100 straight balls on a JUGS machine his rookie year. But he drops the ball in real games, because at game speed when you are still figuring out footwork, timing, soft spots in the zone, etc. the ball can get on you faster than you anticipate.
The point is, I believe his hands are fine. I think he's going to take a step in his feel for the game and when that happens his drops will go down.