Sorry to hear about the problems you guys have with the seat and your backs. My only issue, other than the obvious lack of side bolsters, is the seat losing height for which I still don't have a good answer. It's been to the dealer and I got a BS answer.
I have "contemplated" putting in aftermarket seats...mainly so I don't slide of of my seat sideways.
Maybe an aftermarket seat is what you need?!?!?! I know I'd use that excuse with the wife to get better seats.