I have no doubt that the finished product will look better than the test mules. But I think between the test mules we've seen and the Mission E prototype, the final production car will look much closer to the test mules. I don't think they'll be messing too much with the shape of the car this late in testing since it'll affect aerodynamics wouldn't it?In the pics I saw, the front face and rear C pillars were obviously disguised with tacked on body panels. I must assume those cover panels are doing some work that simple camouflaged paint cannot accomplish.
If the headlights actually thinner like on the E Mission concept, and the C pillar and rear quarter more like the concept of E-tron GT, it could still be an amazing looking car.