Maybe I over exaggerated a bit in regards to how hot the elements got.
That seat heater recall was crap. In the latest literature for that recall, techs were instructed to place the heating element under the foam instead of between the leather and foam. Hence, the "upgrade" it took longer for the heat to reach your b-cheeks.
Discussing the elements catching fire, regardless which part number it's updated to, it's still in contact with the seat cushion foam. I haven't seen the elements in our WK2's as of yet, but I'm pretty certain it's an entirely different type of element.