(skipping over the seemingly consensus ones - simulated transmission shifts and throttle dropouts)
1. No ability to disable any dome lights other than front. Arriving home at night, everyone gets blasted in the eyes with LED lighting when someone opens a door. My 4 year old absolutely hates this. ON-DOOR-OFF switches on each light would be nice. (Or a driver Master Off switch for all domes - to compliment the newly recently Master On switch).
2. Side mirrors are not tied into seat memory functionality - a big negative for us.
3. The location and volume of the PIN code entry beeper. I deactivate my fob and store it inside every time I go for a bike ride from a park & ride trailhead. Several of the trailheads are next to high traffic (loud) streets. Because the beeper that chirps in between PIN code digit pushes is at the front of the vehicle (and not very loud), I have to use a rhythm method to enter my PIN code because I can't hear the chirps. I would love it if the PIN beeper was at the rear of the vehicle - ya know, like where the PIN entry button is - at the rear of the vehicle. Tying it to the super loud power rear gate warning beeper seems to me a more logical option.
Does anyone know if the PIN entry beeper volume might by chance be a dealer customization item?
While on the subject, does anyone have a composite list of what dealer customizations are available for the Ascent? I know many are sprinkled throughout the manuals - on another forum I used to visit, someone did us all a solid and generated a list.