I respectfully disagree that they still need Musk. The man has spent the past two years visibly shirking his own duties as CEO of Tesla while he was busy burning Xwitter down, and his personal brand is getting tarnished daily.
I do agree they need someone a bit more visionary, though. They couldn't just snatch up the CEO of GM or Ford, but I bet you they could find someone out there who can focus on the future.