This is probably a design choice. Personally, I don’t want three independent settings, one for each row, and have to think about which row I want on/off. As is, when I go back to solo driving after carrying passengers, I must now disable rear climate, and I’d rather not have to turn off multiple rows. I prefer the simplicity of front/back logic.
I did a mini all-day road trip yesterday with my dogs in the rear, with the 3rd row seats folded down. The enhancement worked great! Previously, I would sometimes forget to turn on rear cabin and my dogs would start to pant, which was my cue to remember to turn on rear cabin.
There was not a single panting incident on my outing. The rear climate remained on the entire day across new drives. Also, the 3rd row vents tied to rear climate, even with the 3rd row down, is very welcome, giving direct airflow to my dogs.
Thanks to the Lucid team for this great enhancement!