He seems like he should be able to and sometimes he actually does get up into the second level, but when he does it's almost always in a straight line upfield. It seems to me that every time he has to move outside, which he typically would on a screen to his side, he ends up lunging with his head down and ends up on the ground.
They can make some hay with those, but it's really tricky when teams are spending entire games in a dime or even running 7 DBs out there at times.