All those guys improved with Rex in a vastly superior and more flexible system. Offensively they also accomplished more with inexperienced poor QB play. Rex did what Mangini could not. So i completely disagree with your statement that Mangini would somehow have done better than Rex, when literally the exact opposite happened. I’ll agree Mangini had a very thorough interview and evaluation process for draft picks. I liked his philosophy on character guys and captains. inflexilbe and unlikeable as a HC tho, would be better suited in FO role.