Questionable. Going to a company that had experience with car body designs and getting an in-house designer would likely have been a better plan for them.
Many of their problem was due to the assumption that the electric car motor & batters from AC Propulsion were working as advertised and ready for mass production. That assumption was wrong. So the iteration was because changes in the propulsion system resulted in changes to the car, and changes in the car led to changes in the propulsion system.