I think that Abdullah will have different linebackers on him depending on where he is in the formation. If he's in the backfield, Perryman will be on him. If AA ends up in the slot, they could use Jermaine Grace on him because he has a little better speed to keep up with him in routes down the field.
I hope Coley opens up the playbook, but I doubt Nebraska will be as oblivious to the deep ball as Arkansas State was. Defensively, this will provide the greatest test for Miami all season until Florida State. AA is the best individual offensive player outside of Jameis that Miami will see in my opinion.