Sorry, I didn't know that Hyundai was Kia's parent company. I thought they were entirely separate entities. My bad. I apologize, Msterbeau, for my erroneous comments.
It should be obvious that employing an alternate seating position during travel mitigates the effectiveness of a safety restraint system, but we Americans, in general, lack the imagination to elaborate on the eminent. That's why so many of us dangle limbs out the windows of our vehicles, drive with one foot on the dashboard of our car, let our kids sleep sprawled on the back seat, etc.
I would think that engineers would have a very difficult time devising a safety restraint system for a forward facing reclining position. The way I imagine it, it positions the longest, heaviest, and strongest bones in one's body (the femurs) directly in front of the torso which houses the vast majority of one's vital organs--all very soft tissues. So, if there were an accident at high speed in which one's vehicle came to a sudden stop, one's knees would ram into the dash sending one's femurs through the pelvis; one would be impaled by one's own legs. The bonus is that a full-grown adult can be buried in a child-sized casket, but the downside is your little organ donation endorsement is bunk.
I can't see how any of this would be Hyundai/Kia's fault. The accident wasn't a failure of the safety restraint system. The system was not being employed as intended.