I think that's exactly what Newey did when he joined RBR in 2005, taking a struggling team formed from the ashes of Jaguar Racing, turning them into multiple world champions.
Granted, the success didn't come immediately but one could argue that the RB3 and RB4 were designed and built during a period of transition, before the RB5 brought a modicum
of success and then the years that followed saw them dominate.
Would I like him to do that again? You bet.