Ok so I followed up on this and started the season over and picked out a young rookie who was 6'2 had jumping of 92, catching of 69 which is good for a LB. First game I get in good position, hit Y he jumps, picks off the pass and I run it in for a TD. I would say this is very significant as with the other player I played nearly 20 games and never got the animation even once.
His zone and man were better too, but I don't know if those matter if you are usering the player. I think catching may be the culprit here and will continue with this guy and see if this answers the question. I still have the weird issue where a corner outside on some occasions just kind of stops and doesn't do anything, and that seems like a quirk so I am wondering on those if I just focus on using the stick to keep the guy in tight coverage rather than using ball hawk if that might be the right solution.