While I'm not a huge D&D player (only last year did I started campaigning with friends), I also feel something... awkward with BG3's combat, and that already came from DOS2. Can't really put into words, but it's like the combat drags itself too much, or that it happens in a different reality from the main adventure. I'm waiting for patch #4 to hit and then I'll return to see if can explain it better.
I have the exact same feeling.
It looks like combats are "silly/funny" parenthesis in the story (jumping, dipping, throwing things, eating food,...)
But this is the positive thread and the story is probably going to be interresting^^
