Potential owner here and reading about all these issues is definitely not good.. I don't need this car that much so I think I'll wait until quality issues are resolved in a couple of years. Benz and Porsche Mission E will be out by that time and they've got their manufacturing down.
That's my biggest worry with my Model 3 reservation. After all, I will still have to wait at least until "Early 2019" before I get it, but even that won't guarantee satisfatory build quality.
People always criticize traditional automakers for taking a long time to get their BEV offerings to market. But actually I think part of that longer time ensures that far more cars arrive in customers hand without issues than with Tesla vehicles.