Pathfinder uses a system that is much more similar to DnD 3.0, which some people vastly prefer but I, personally, always felt like it became ridiculous especially at higher levels. Moreover, WoTR in particular FOCUSES on those higher levels - exactly the range in which I think the system most begins to fall apart. The "build flexibility" in the game allows you to make absurdly munchkin builds that the game balance takes into account, so monsters have INSANELY overinflated stats to balance that out. And there is no concentration mechanic, so yes, you can stack infinite buffs on yourself pre-battle and the balance takes that into account to.
I REALLY don't like the combat mechanics in WOTR. That being said some people love them. And I do think it does a better job with storytelling than BG3.