I'm afraid I don't know the builds well enough to comment on if there were changes. My build is anything but optimized I'm afraid!
Finished the main storyline finally today
Satisfying I thought. Now I am going to explore some more and do the two expansions.
After I said I hadn't had any bugs, then I had a few of course. Nothing big but I went back to finish up a quest that I would have failed if progressing the main storyline and Philippa had low level of detail graphics for all her clothing. Like what you'd see if she was loading in in the distance but then should be replaced by HD textures up close or for the cutscene. And then doing a part of the story as Ciri, the Wild Hunt enemies had parts of the bodies missing, or if they were whole to start, once I hit them parts of them disappeared. And not like they were supposed to, as if I had chopped them off or something, just popped and gone.
Anyway, nothing game breaking clearly just oddities. And that is without using RT or DLSS obviously on my system. Can't say for sure if those bugs existed before the next gen patch. I've only played those parts once.