My semi professional opinion ( since I exited automotive right around Tesla's public vehicle launch ) they are rushing to compete in an established market. It takes a long time to dial in quality on the stampings and frame, especially if material vendors change or others uses to ramp up production. They are focusing on production numbers to stay viable as a company. The early model had a comparable front lens design to other competitiors, the rear lens was a cheap get this assmebly done type design. Focus was on the front because everyone looks at the front of car for press pictures etc