I don't know...
But what I do know is, you can't learn to be a disciplinarian, you either are or you're not & once you show that you're not its virtually impossible to pretend like you are after the fact.
The toothpaste is already out of the tube, who he is is who he is, Coaches just like Tigers don't change their stripes. You don't start out as an easy going pushover & then evolve into a hardass iron fist ruler, it usually goes the other way around.
Players respect authenticity & consistency, if you show them a different kind of leader every year they don't believe you. If he's going to try & be more strict as a HC his best bet is get rid of every kid on the team that didn't listen to him, the problem is if he did that he wouldn't have a full team to field for the season lol.