They probably don't, but I do hope somebody who works at Mazda actually sees these threads. Since I sold my '17 GT for precisely this reason (and still miss it) I swear I've seen at least half a dozen more threads on this subject pop up. It doesn't take much searching to find one while doing research on the vehicle either and has to have scared off at least a couple of buyers, not to mention people who DID buy like myself and had to take a huge depreciation hit getting rid of the vehicle because they couldn't live with the situation. Not exactly good for repeat business.
The bottom cushion bolster design is simply a poor design, full stop. The foam is hard as a rock for no good reason. It doesn't improve the bolsters' ability to hold you in place in a corner, it just creates a hard edge against which to press the nerves in your hips and thighs. From there it's a matter of genetics. Not everybody has their sciatic nerve in exactly the same place (or depth) but if yours lines up with the ridge on this bolster then the seat becomes a torture device.
I also think, generally speaking, the people suggesting foam cushions and such don't have this problem and haven't actually tried that solution, because it doesn't work. Not only that the best thing it can do is effectively trade one problem for another. The secondary issue with these seats is that the lumbar is too flat even with the lumbar set to it's maximum setting, and doesn't have the proper "S" curve required to conform to your natural spinal curvature. It's just flat. So when you put a pad on the seat bottom this effectively shifts the already inadequate lumbar further down your back to the point where it's not longer hitting the lumbar spine but is instead just pressing into your sacrum (which is not productive at all). Even healthy backs will ache from an arrangement like this, and sitting this way is bad for your spine.
So you get to choose: radiating sciatic nerve pain or a terrible back ache. Car makers have been designing decent comfortable seats for many many years so I just can't fathom how Mazda went so wrong here but I truly hope they get it right next time. The CX-50 and it's inline six engine sounds sweet and I'd be interested in owning one if Mazda corrects the mistakes they made with their seat designs for that generation.
