Much as I love WOTR, hard disagree there. BG 3 is much better in terms of reactivity and consequences, polish, and all of its mechanics work properly. Meanwhile WOTR has the stumps that are 50% of its mythic paths, the not particularly well received crusade mode, and one of the worst dungeons I can remember in rpg history (I will freely admit that this last point is not as objective as the rest of my argument, but I know I am far from alone with this opinion).
There’s definitely some rough spots, as well as some hints of changes to the storyline and possibly planned endings, but I don’t think the latter will be touched and I would be surprised to see structural changes to the story at this point. That being said, I could potentially see some side story content, but I am uncertain what form it’d take.