When it comes to performance weight is everything!! Running fixed headlights just makes good sense. There is only so much you can do with them and still maintain a good aero approach.
IF they get the car down to 2700 pounds it will be able to compete against ANY car world wide. I really don't like Vettes, but I gotta say, the last couple of years they have gotten my "respect". There the car I love to hate the most now!
Ernie