Kyle Williams isn't a true NT, but the guy plays the position great, even if it isn't the normal way and he isn't as big. The biggest problem with the defense last year was Stroud at DE, and pretty much all the LBs. Poz was pretty good, but the guy wasn't a playmaker. He looked better than he did because all the other LBs sucked so bad. Moats showed he is pretty cool as a pass rusher, but hasn't proved much as the run goes.
With that said, losing poz sucks, because he was our best LB on the team. We have to either hope that Shepard is fast learner or hope they find someone decent to replace him.