Take it from a Redskins fan, you don't want Spurrier. As a head coach, he takes no interest in the rest of the team apart from his QB's, his blocking and protection schemes are just not good enough for the pro's (do you want Randy McMicheal catching passes, or trying to block the opponents best pass rusher?) and he has an inability to adjust.
Spurrier is a good college coach, he is a poor NFL coach. He is too layed back for the NFL.
Maybe someone could argue he would take on board the lessons learned from being the 'Skins head coach, but I doubt it, he was stubbon for two years in DC, why would he change now?