I really hope that the next Bills HC hires quality OC & DC to handle the play calling on both sides of the ball, and focuses on game day management and being a great "leader of men"(motivator).
If you aren't good at the latter, chances are you will fail as a HC.
The 1,000,000 question...how do you know if the coach you hired is going to have these attributes when he has never been a HC before.