re: Hasn’t Saban added three former NFL head coaches since this search started?

To be fair all of the NFL coaches on Sabans staff are on backslides on their careers (been fired or not kept with previous employer). That's usually the case with the former college HCs as well (typically former coaches that were fired and/or not retained).

Nielsen is clearly on the up. Which means he probably wouldn't have ever even thought to accept a position coach role with Bama.