Never really followed Mokwuah's recruitment that hard, but just did more research. He's physically looks like a clone of Muhammad Wilkerson of the Jets. Everyone here is talking about him at nose, which in some ways makes sense if he's the biggest body on the DL, but looks to have long arms and hand control to dominate tackles as a 5 tech in a 3-4 as well.
The value in that is that it's hard to put a double team on the outside, and running to one that side becomes a problem if the 5 tech is a mismatch on the tackle. In passing situations, if you have an OLB coming off the edge, the tackle can bump out, but you'll have to hope the guard is going to be able to slide AND take on a massive, long armed 5 tech, which is a mismatch every time. Also leads to huge opportunities for stunts. The best example of this is the combo of Justin Smith and Aldon Smith on the same side, which there are really no good answers for.
Basically if they can get him in shape and coach him up, he should be able to play NT, 4-3 DT, or 3-4 DE, which is great for versatility.