Ass clock management will cost you a TON of games, especially of your roster isn't loaded with talent to hide that one fatal flaw for a HC. Herm Edwards, Mike Singletary, and of course from the present day Nathaniel Hackett comes to mind. Then you have the guys like Mike Martz who had the rosters to cover up their game management stupidity but once those elite horses are gone and aren't properly replaced, the emperor's lack of clothes gets promptly exposed.
As for outsourcing game and clock management duties, that's basically the beginning of the end for a HC. Afterall, if he's not calling the plays for either side, and he has another coach in charge of his gameday management duties, then what exactly is he getting paid millions (guaranteed at that) to do? Answer the media and be a useless figurehead?
Teams like the Lions can't afford fundamental imperfections from their HCs. They just don't have the rosters nor cultures to make up for it. There's a reason why a Bill Parcells could turn moribund teams like the early 90s Patriots, late 90s Jets, and mid 2000s Cowboys around. He knew football inside and out, and his gameday management was 2nd to none. He also took the Giants over the hump to become SB champs, but the initial heavy lifting of turning thier culture around was done by Ray Perkins.
TLDR: Madman Campbell is too imperfect to lift the Lions up a few rungs on the NFL hierarchy.
