Honestly, I think the floor for the Bills with a healthy Josh Allen is 10 wins and getting into the playoffs. Unfortunately, it seemed like with McDermott that the ceiling wasn't all that much higher than the floor. He got 8 seasons with one of the top talents to ever play the quarterback position and could not get the team over the hump to even make a Super Bowl, let alone win one. Only two AFC championship game appearances even.
I think he's a good coach. Even a very good coach. But it became clearer to me year after year that what was required to make the next step wasn't going to come to fruition with him. It was time to shake it up - although I would've blown it all up, including the front office. How many more chances does a guy get with a generational talent at QB before you say "alright, it's time to give someone else a go here?"