If Shanny doesn't keep RGIII in during that playoff series then this is a moot point. Plenty of coaches get stuck with players they initially weren't fond of. They still mold em and make it work to their advatage.
Shanny's idea of a fix was a washed up McNabb, John Beck and Rex Grossman.
The next coach of the Skins will likely jump at the chance to coach RGIII and do well there.