What I've heard is Tesla has grabbed a lot of design talent from Apple and Google.
What it has yielded is some stunningly strong board layout and integration, with housings, cooling, connectivity etc.
I think that much has been confirmed by the 3rd party, Model 3 teardowns.
They also got some pretty good UX talent and inherited a strong penchant for secrecy.
These sorts of things are why you locate in Silicon Valley instead of Michigan. Especially if you see yourself as building wheeled, autonomous, thinking machines.