Well, there is the release latch the lets the seat flip forward to gain entry to the rear. Sedan doesn't have that. I'm not sure how much of a pain it would be to remove the heating elements and wiring from a sedan seat and put them into your coupe seat. It looks like they are an enclosed pad that just kind of sit (maybe glued) between the foam and the leather, so it might not be that bad, but given how hard it is to do a lot of things in this car, I wouldn't be surprised if there is some head-scratching "gotcha" in there.
Also, the Recaros would probably be a no-go. Since those seats actually integrate with CUE and you can see your adjustments on the screen, the connector is probably completely different.
Also, the Recaros would probably be a no-go. Since those seats actually integrate with CUE and you can see your adjustments on the screen, the connector is probably completely different.