What is the ceiling of any of the new head coaches, if Mickey Loomis is retained as GM

The word about the saints is that they're a mom and pop shop. Mick is not serious about improving the FO because if he was he would be trying bring an outsider in. I apoaud him for bringing in a coach with no previous connections but you are delusional if you think that's the only change we need.
Lots of people think they are the guy when they have some success, until they get humbled. Loomis just got humbled when the owner fired his HC. For all he's done for the team, it seems he's earned the chance to change things up and do this one more time. I'd prefer a younger GM whose roots don't go back to the 1990's when the game was much different, but I don't think he's incapable either.