Thurmie, you make some good arguments, but I think Chandler is right on this one. Yes, it's possible that a coach with three straight years of bad outcomes can start to get good outcomes the following year, and yes there are all kinds of reasons why a team might be bad three years in a row.
However, when you get three bad years in a row with a coach, you have to look at those years and ask yourself what were the reasons for such poor performance. And when you ask THAT question about the 20010-2012 Bills, an awful lot of the answers seem to point to the head coach. For example:
The head coach said the 3-4 defense was the way to go in the NFL when he was hired. That, among other things contributed to Poz leaving. After two years, he changed the defense.
The defensive coordinator was fired. Who hired him?
The Bills have gone three years saying they can win with Fitz at QB. Who's decision was that?
The Bills have a guy who, at least in terms of apparent talent, is a top 10, maybe top 5 running back, and he consistently gets too few touches per game.
The Bills are consistently outplayed to open the second half.
The Bills are consistently outplayed in the fourth quarter.
The Bills lose 8 games in a row.
The Bills lose 9 games in a row.
The offense is regularly ineffective. Who's the offensive coordinator? Who hired him?
Those are all characteristics of head coaching problems, and when you have a lot of identifiable coaching problems, then there isn't a lot of reason to believe that a fourth year is going to be different from the first three. Could be, but I'd have to say the odds aren't good.
Consistency is important, I agree, but if you have Bozo the Clown as the head coach, 20 years on the job isn't going to change the outcome. I don't think Chan is Bozo the Clown, but there have been enough signs that, for all his talent, Chan doesn't have what it takes to win games.
So I think Gailey should go. I DON'T think Nix should go, especially if he's willing to fire Gailey. I DO think Nix should be on a short leash for two reasons: He hired the wrong heac coach, and he's mismanaged the QB position. I think he gets this off-season to fix those mistakes; if he takes no significant action, then I'm ready for him to be unemployed, too.