While I will never influence an NFL team. I have worked for many organizations, when you take additional duties vs laser focus it certainly a “thing”. That said there can be positive outcomes just as easily as there can be negative ones.
Case in point, while I can certainly armchair criticize McDermott for game play and clock management decisions . The results on defense are pretty clear. They have kept us in games no doubt.
If they don’t hire or promote someone, my guess is Kyle Allen or Barkley will pick up the responsibilities of QB coach.