I disagree I thought os2 had decent voice acting and did not sacrifice dialogue choices at all in order to make that happen. Some of the best moments in the game e.g- lohse's song, would not have the same impact without voice acting. Voice acting was not planned for os2 but it was heavily requested which is why they decided to add it and imo made the game way better.
Well, we will have to agree to disagree on that point as I felt it compromised it quite a bit. However, let me raise a different point. BG still has a devout modding community twenty years. Quests, areas, and companions, whole expansions out of whole cloth. By interjecting a narrator and voices it forces the modders to go the extra mile and deviate from proper writing, but also necessitate vo.