Push button doors.
 

From the photos, it would appear that the C7 has retained the push button door opener feature of the C6. Could someone that has seen the C7 in action comment on whether the PBDO feature is the same, better or worse than the C6?

I would be reluctant to evaluate the performance of this feature on any of the pre-production cars. It is almost impossible to guess what may still get tweaked before factory cars are shipped. No telling what sort of hardware is in the doors at this point.