To add my own two cents to the discussion...
Front: I like the new front overall, although I agree with several others that the black plastic grill piece should be replaced with black metal. Aside from that, however, I think the front looks more mature and I like the evolution versus the earlier prototypes. I do miss the blue light-pipe effects of the prototype, but I figured those wouldn't be street-legal and would have to go.
Side: I too miss the Tesla 'T' vents but I think the overall side profile looks solid. The side profile looks a little awkward on the alpha because the doors seem to have a metallic lip that extends below the paint line of the remainder of the side profile. From a distance, or at the small size that is shown on the blog, it looks like a mis-alignment of panels. The door handles still don't look final, but those and the side mirrors look more mature as well.
Rear: The rear lighting doesn't live up to my expectations. I hope that what is shown in the video is a placeholder since even when the headlights are on, the rear shows little illumination. The bulk of the rear light fixture is wasted space. I'm not happy to see the "light pipe" look of the rear lights removed. The following is a poor photo, but this is what I'm referring to:
I'm also disappointed to see the diffuser treatment of the prototype go. In the prototypes, the diffuser appeared to be wrapped by the painted left and right panels--an effect used on many sports sedans.