Had a direct experience today at a local dealer. I'm on the shorter side, so height fitment is never an issue for me in most vehicles. Seats at least initially are definitely better than my 2019 CX-5. Immediately feels more supportive without the back and seat area itself being too firm, but I'll note I do prefer a firmer seat in general. The seats also visually appear wider at least on the bottom. But, I think past Mazda seat complaints have also been that the foam padding inside starts to crush over time, and so only time will tell about the CX-50's longevity. My CX-5's bottom side bolsters have definitely compressed over time.
I don't typically rest my right elbow on anything while driving, but the CX-50 center storage top seems a little better positioned for that. It also is less "cushy" than my CX-5--I think I read somewhere that was done on purpose for better stabilization when someone leans on it to assist in getting out of the vehicle..??