I honestly miss remembered McDaniels time in Denver to the point where i forgot he got fired before Tebows weird era. And the whole debacle with the Colts and yeah I think you can definitely say he belongs with the likes of Weis and Crennel in Belichicks aggressively mediocre coaching tree.
As for Vrabel, I knew he was never a coach for NE but he's probably considered a Belichick disciple given that he spent 4 years in a Belichickian laden staff in Houston (under Bill O'Brian and Crennel).