Re: power folding mirrors. I agree it would be nice for the cool factor, but if you've ever (manually) folded the CTS mirrors in, they are so thick that doing so doesn't really save much space width-wise. But folding them does prevent someone from knocking it off, I suppose.
Re: back-up camera. Just be glad you have one. I got into a parking lot fender bender a few months ago because it's so damn hard to see out of the back of my car when coming out of a diagonal space and the '08s were not available with a camera.
Re: gear shift indicator. I am actually surprised by how many people complain about this. I agree with the poster above that I just go by "feel." But also agree that it wouldn't kill Caddy to just wire a bulb in there.
Finally, one thing that I think is missing, that they should have definitely added during the cars run, is side repeat markers in the sideview mirrors. Side turn signal repeaters are required in Europe, and I think they should also be required in the U.S. They definitely increase safety, especially when driving on the freeway.