Derrick Thomas was weak against the pass. He was never able to cover the tight end. It was because he was always covering the QB. Good players play to their narural strengths and work on their weaknesses.
DJ has done nothing to convince me that he cannot be dominant at any LB position. I think DJ will find a way to overcome his "weakness".
Didn't you guys just re-sign a LBer that is about 4 foot 11? How does that dude shed blockers?