The 'final designs' of other companies' EVs still look ridiculous.
Volt, Leaf, i8, none of them look like regular cars like Teslas do.
'Regular cars' look like they do because of design limitations imposed by things like fuel tanks, engines, and gearboxes.
I think the fact that it needs to have Wheels and be aerodynamic as possible while having a decent amount of interior space has more to do with it. And even without a motor you still need a crumple zone for safety.
I think the Volt looks pretty good. Better than a Tesla, which is just a generic black sedan, not remarkably different from the look of a Honda, Lexus, Audi, etc.