I don't think it's possible to humble Pruitt. It's really hard to get him to comply with rules he doesn't like.
That said, as others have pointed out, there really aren't any rules anymore. The real question now is whether Pruitt would undermine his boss in order to get the boss's job. Not an NCAA violation because there are no rules to violate. But it does hurt organizational effectiveness -- IOW, winning on the field.
Is his undeniable ability to coach defense worth the organizational baggage? Tough call. I'd be curious how Pruitt interacted with other members of the staff.