Moving to Texas is probably the right long term move for manufacturing. Not just because of the health order, but it is an opportunity to execute the plan while having the high ground.
To be honest, judging from the how everyone rushed to the beaches and parties at the mention of "re-opening", a second wave is guaranteed and I estimate it to be around September. So if they can move the plant there within 3 months time, there's nothing that will be lost.
I wouldn't have said it before, but now that we have more data on how this virus behaves, safely opening the plant while following protocols that they implemented in Asia should be fine. As evidence shows from Asian countries that have almost eliminate the virus and has re-opened, the second wave infection point after reopening are not the factories, but night clubs, gyms and large festivals. For the most part, if you are young and healthy, you should be fine. If Tesla refrains from working their workers to exhaustion so their immunity system doesn't weaken, it should be fine.
What is actually intriguing to me is how the gov and health officials of the west are actually so far behind on how to react to this situation vs the east. Almost as if, the lessons learned and implemented there are not being reviewed by most of the western countries. You can see a clear distinction of infection and death rate between western countries that followed the Taiwan model vs those who did not.