Disagree, there are a lot of MLBs slower than that in the NFL. MLB is all about instincts, and he has great instincts. He's got to work on his pass coverage some though.
Did you note that most of the gashes through the "center" of the line were right at AJ's gap?
There were at least two instances where I noted (or at least alluded to) that during games or in the Game Report
Agree 100% on the need for improved pass coverage, though he was FAR from the worst cover LB we had this year (the worst was beat at least three times Saturday)