Compton seems like a guy with all of these great intangibles and has some good film playing inside in a 3-4. I'm not sure if he is big enough to play Mike in a 4-3, but he's really just a couple of pounds lighter than Luke Kuechly. He's a couple of inches shorter, so maybe a bit more stocky.
He he looks very athletic on paper. Perhaps McDermott can help take his game to the next level. It's worth a shot.