[Paintrain]

If there is a move made against MS (which I still doubt until his contract is up for renewal barring a disaster in 2013) you have to consider the personnel implications of changing coaches, especially on offense. Let's just look at some players who probably won't fit into other schemes (power running game, vertical passing game, etc.) as much as they do our current scheme:
Alfred Morris-One cut, downhill, zone runner. He probably wouldn't be as effective in getting chunk yardage in a power game and wouldn't fit much at all in a spread passing game relying on speed and quickness.
Stieger, Chester, Monty-Playing pretty well as a unit but probably won't fit into a scheme requiring power blocking or pass blocking for a 5-7 step dropback passing game or spread passing game. Even T. Williams to a lesser extent whose strengths are his mobility and athleticism may not be as effective in a power scheme.
Morgan, Hankerson, Garcon- Arguments exist about how productive they are now but they are best suited for a WCO type, YAC passing game, not a spread (none are particularly quick) or vertical (none have blazing speed) passing attack.

Those are just off the top of my head but it's just to make a point that just changing the leadership isn't a magical cure to what ails this team.

While I get the frustration and angst with the results of the current regime, one of the reasons the Giants, Steelers and Packers remain competitive and at or near the top of the league every year is because they have philosophies that the organization is committed to and they draft and coach to those philosophies, not changing them every 2-3 years to suit a new master.