I agree with rear mirror to see in the back seats. Should be a sunglasses holder - or at least make a sunglasses holder an optional insert to the mirror.
We've heard about the feature that gets you all excited; now let's hear about the one that, in your opinion, is completely useless.
Can't put the vehicle in gear if the auto parking brake is on unless the seat belt is fastened. It's a pain when detailing the car. My driveway has a very slight slope, enough for the parking brake to auto-engage. If I want to move the car enough for 1/2 revolution of the tires when cleaning/detailing them I gotta fasten the seat belt! And I agree with most of the other useless items!
Oh, on the plus side, on my 2013 Nissan Pathfinder when auto-opening the tailgate, the car would beep and flash the emergency flashers for the entire time it took for the tailgate to open. Thankfully on the Palisade it only beeps and flashes twice!