He's never been a coordinator or even a position coach at a major program, so there isn't much history to draw on there. It may say something that Belichick kept him as his D.C. for 5 seasons, but again, drawing conclusions about the D.C.'s performance on a Belichick-coached team is tough to do.
His other experiences in the N.F.L. appear to have had poor results by any objective measure: Statistics, player relationships, locker room culture.
Having said all of this, we do know that he'll be working with an exceptional talent base relative to nearly every other team they'll play.
schemes, you don’t have 11 NFL caliber kids at the college level. That was the biggest problem when ND had VanGorder. It’s was too complex for college kids. These kids have to play fast. Complex schemes in college give you paralysis by analysis because they are thinking too much and not just reacting.
Only one guy who coached with Belicheck has really amounted to even thinking about. And saying that guy was good because of Belichek is a stretch to say they least.