Leftie, I haven't felt that bolt. It may be there but the rest of the seat's contours overwhelm that sensation.
My conclusion is that the seats are "tolerable." They are clearly defective in design or manufacturing, but tolerable. I've driven it for a week with a auto cushion memory foam and a back support. I am driving it now with out either. The car is easier to use as a tool without all that stuff.
Entering and exiting, because of that hard plastic bolster is difficult using the swing both legs over the sill technique. Again, I've learned to accommodate. I pull myself in with the steering wheel and I pull myself up and out with the steering wheel. That technique works without back pain and without hitting the back of my leg on the plastic bolster.
We've driven two one-hour segments without pain or problems. We'll try some longer trips probably in February.
I agree with one poster that the seats seem mis-designed. And no, I don't plan to take them apart to modify them. I don't trust my skills to do that.