Overall (as far as I can tell right now), I think I like it. I think it would be received better if the '14 refresh hadn't happened, though. In my opinion, the '16 has taken the '10-'13 and made "refinements' more than it has to the '14-'15 (or maybe it's actually made true refinements to the problem areas of the '14-'15). Let me explain what I'm seeing.
For the front, it took me a while to appreciate the '14 refresh and I'm still not fond of the headlights of the RS model. However, the front of the '16 feels to me much more like an evolution of the '10. (I know, I'm cheating by not using a standard '10 model here.) The halos have evolved to be a variant of the '10's circles, the grille has been squished and the lower portion (grille?) enlarged.
For the rear, I'm still not super fond of the '14-'15 rear, but I think the '16 pays homage to the double taillights of the '10, while making some styling changes. (I won't necessarily say improvements, but I do think it's an improvement over the '14-'15 rear.)
All in all, I don't think it's as iconic as the '10-'13 model, but I do like what I'm seeing. Hopefully the interior will blow us away. Looking forward to seeing better pictures tomorrow!