This game was amazing and clearly the team is full of amazing writers. I just completed my first playthrough of over 100 hours and am about to start my second playthrough. That being said, the ending was overwhelmingly lackluster. The final fights were okay, but after spending all this time bonding with companions, I wish there was a way to switch them out during the final fight.
Also, the final cutscenes left a lot to be desired. Those did feel rushed, but if DLCs were added to go and follow-up with our companions, that would be cool. Such as, my ending was with Astarion. It would be great to have a DLC to help him walk in the sun again. Or a DLC that allowed your romantic partner and TAV to seek out your other companions. In that case, it could be something like helping Karlach and Wyll escape Avernis or delve deeper into Shadowheart's religious choices. I realize not having a happy ending for everyone is more realistic, but again, after so many hours and emotional quests, more follow-up would be great.
I also don't understand what the purpose was of choosing whether or not to celebrate at the end and not even getting a cutscene of them partying.
Third, the upper city of Baldur's Gate. I wish we could have explored the city somehow. It was right there the entire time. Even getting there through the sewer's or something. It just would have been nice to have some quests that allowed us to explore it since at least for me, I felt as though our whole journey was leading us there. So to only get to see it in shambles was disappointing.
Again, this was an amazing game that was extremely detailed and fleshed out. I only wish the ending matched that level of detail, but hoping that this could be an opportunity to expand upon!