Rex Ryan was like having norovirus where you purge your guts out, and it sucks, but in the end you're glad that it's finally gone. Getting that gross analogy out of the way, I admit that I was relieved for a change, but basically indifferent as to the hire itself (Bills have had a lot of terrible coaches over the years plus Whaley and Brandon were still in the building at the time).
I'm glad that the team started cutting dead weight early, and it was apparent from early on that the guy could coach. I didn't know he'd be this good, but not knowing this (and having the team be in a great position now) are good problems to have.