Yes, and I am very bitter towards him for not sticking out the remainder of his contract and leave this team in a better position. Had he left next season, we probably wouldn't be talking about Norv Turner becoming the next head coach. He forced Jones Disaster Plan A and that is unforgiveable.
The players ultimately do have accountability. But most Coach Parcells bashing started with the head coach and pointed right to a stifling of the talent on the team.
I think some things will improve, regardless of who the head coach is. They usually do if the talent is there. Change alone sometimes breathes new life into a team. But where Turner has failed is with managing games and controlling his players. That is where I believe he will fail, as he has done in the past. I won't even get into his weak player evaluation skills, which are equally damning.
If he has a strong staff around him, including people like Rivera, he has a very good chance of at least aspiring to mediocrity. That will still far short of what people demanded (and expected) from Coach Parcells.