I had the same impression when I first bought the car. I felt that the seat bottom was angled too steeply and I felt like I was sitting on a toilet. Like you mentioned, they made the cushion much firmer under the thigh than in the rear. Most car seats do the opposite because there is far less load at the thighs. I'm surprised you aren't bothered by the headrest. They're positioned a little too far foward.I just bought a new 2014 with high hopes for the zero gravity seats, but I find them to be so uncomfortable. I am sure the seats would be very comfortable if I were in a spaceship, but while driving a car, the seat position is sub-par. There is no support under the butt, and too much support under the thighs. I feel like I am sunk into a bucket, and after a half hour, it starts to bother my back too. I have tried every seat position. Anyone have a solution that works for this problem? Can the dealer adjust the seat angle?
Anyway, the good news is that you will get used to it but it will take time. After a year and a half of ownership the seat actually does feel comfortable for me, but I do wish the headrest was further back and I'd also like more cushioning in the backrest in the mid-back area. The only seats I've sat in that are comfortable right away are Toyotas and Subarus.