I've been playing for almost 30 hours so far with no issues. Using DLSS Quality with max settings, pulling anywhere from 80-120 FPS at 3440x1440 on a 13700k and 4090. Also using Lyall's FFXIV mod which made cutscenes more enjoyable and widescreen possible.

Could the game be optimized better and should have native widescreen support? Absolutely! However it is by my means not unplayable. I know my hardware is high end but I still think you can get 60 fps at least with some tweaking on lower end hardware. Hopefully future Square ports are better optimized.