I've read that he was the token engineer in the see of accountants, MBAs and consultants.

Cultural change goes much deeper than changing the CEO. Boeing might not be salvageable on the cheap side. Decapitating the company at levels 1-4 may not even be enough. It may require acknowledging that changing the flight envelope and software-patching it was a mistake.

This is a major can of worms on itself. This means a plane redesign, 6-8 years delay, and probably another round of WTO-unfriendly subsidy.