I love what he's done to turn around the franchise but maybe instead of using the same old cliches like, "humble and hungry", "trust the process", "playoff caliber", try using, "mean and nasty", "progression not regression or stagnant", or "Super Bowl caliber".
Biggest mistake of his is stubbornness. Like, I understand the concept of, after winning the coin toss, to defer to try and double up scoring at end of first half beginning of second half. But good teams alter that depending on situations and opponents. He never changed that. Case in point, week 17, Bengals game he deferred after winning the coin toss and the Bengals went right down the field and scored a TD. The Bills responded with a FG and on the next Bengals drive they were moving toward another score when Hamlin happened. So Bengals playoff game comes and we win the toss again. He deferred once again knowing very well what happened a few weeks back. Instead of playing behind a team like Cincinnati, maybe the Bills should have received the kickoff and went down and scored a TD so the Bengals have to play catch-up all game.
I've not seen anywhere where this has been mentioned.