Demanding, Detailed, Accountable Klint Kubiak is winning over coaches and players alike

Dorsey was a bad apple. He was also said to be a “hot head” and his antics wore thin. The cancer was removed and they got better
They got "better" but it had nothing to do with Josh Allen. They basically ran the ball at a much higher rate while Josh Allen got worse across the board. You might be right it in being more of a case of being a hot head instead of what they did on the field.