I've been anxiously awaiting the return of this car, and with every glimpse we get that is closer to the final I've been happy, with one exception: The tail lamps and backup lights.
I think they got it dead on the first time around. You get the backup lights combined with the tail lamps in a nice looking package. No crash ratings or wiring issues either.
If it's not offered by GM this should be an easy upgrade at any good body shop, and will be something I might have done.
Then again, this is just my opinion.