Let's compile them here. This rendering is floating around -- looks way too much like a Cadillac ELR and I can't see Chevy returning to round taillights. I remember reading articles when the C7 debuted that GM's design team really tried to decrease the average age of the Corvette demographic, and the C7's angular taillights were received better by younger focus groups.
They just don't look American. I'm all for innovation and changes, the Viper definitely looked a bit different, but retained that rough look to it. Need's a bit more hard lines, hard edges, of course not boxy but just aggression I guess