XIV graphics have aged terrible. And that PS3 optimizations are to blame, we will forever feel the drag of that console, and the PS4.
Is that simple: FFXIV will always screw PC gamers in favor of keeping the experience the "same" through all platforms. And they are not even releasing mod tools so we can do the work they didn't.

The textures have no higher res models, which is the usual way of texturing games, instead, to cut expenses and probably make a declaration of the new design philosophy, these textures ARE the high res ones, they are fully unpacked... And yes, is absolutely terrible. People who say, the graphics are fine, are either reading 2013 reviews of the game still, or are just console players and they know no better. And no, i'm not talking about 4k (4k is not that great honestly). Im talking about actual graphics, like shadow shimmering EVERYWHERE, like, the whole game is broken at shadows, the thread is still up there after like 3 years since HW basically destroyed the shadows.
As an advice, don't use parallax, the resolution of textures is just too mediocre for it.

Also, no ultrawide support cutscenes. 2019. They really need a graphic suit overhaul, badly. I hope shadowbringer zones have better assets.