If you want to go on past results, sure, the coaches with the Bills had mediocre results.
How did Marv do before he was coach of the Buffalo Bills?
How was Joe Torre perceived as a manager before he took over the New York Yankees?
Was Bill Belichek considered a great coach before he took over New England? SO many Browns fans COULDNT WAIT to get BB out of town, think they want to take that back now?
Here is the thing: Jauron's record with Buffalo is a whopping 0-0....it is impossible to sit here and give you 100 reasons why DJ might be a bad coach or be a good coach in Buffalo.
In Chicago, DJ had an incompentent GM to go along with a cheap owner who did not give him the right tools (meaning $ for players) to succeed. Maybe things will be different in Buffalo, who knows.
Time will tell, and let's just see how it all shakes out.