I'm sure a lot of that will go away as their manufacturing process settles down. I like the recent announcement that they're going to simplify interior options, and that tells me that they're taking a look at optimizing their process.
Simplifying the process means better quality control, which means more predictability, which means less stress for employees.
I'd love to see them get on par with other car manufacturers on cars produced per employee per factory.
They're simplifying the Model X interior choices, that's a lower-volume model. Model 3's only interior option is color, black or white.
Tesla is not planning to get on par with manufacturers that outsource a lot more than Tesla does. In fact their new Chinese factory is planned to be even worse, because it will produce battery cells and car motors in-house.
So, less options for customers (not saying that e.g. Audi is exaggerating on that front) and full vertical integration. There are reasons why oitsourcing happened, I did not see a convincing explanation why it is good for Tesla not doing it.
Simplifying the process means better quality control, which means more predictability, which means less stress for employees.
I'd love to see them get on par with other car manufacturers on cars produced per employee per factory.