If the Packers don't knock it out of the park with this coaching hire, then the final years of Aaron Rodgers illustrious career could be wasted. At the very least, it could set back the franchise another couple years.
For whatever reason, McCarthy stopped getting the best out of this Packers teams. The culture had become stale and while a chance might have been necessary, Green Bay now faces the difficult task of finding a head coach that's better than McCarthy, who is a proven winner and who also is in high demand, with interviews with the Jets and Browns already.