I wouldn't necessarily agree that giving closure to all these points is a luxury, after all Baldur's Gate 2 never had issues like these. And I'm of the opinion if something minor like these encounters were only half done, they should have just been cut from the game.
If modding was advanced to the point where everything here could be fixed that would be good too; but the support would have to be to the level where modders are willing to do voice acting to complete some of these things for it to really feel part of the game, and unfortunately the modding community with Larian isn't quite there yet. I hope it does one day though. At the same time that should not give Larian leeway to leave things unfinished with the intention of the modders fixing it; that's problem that's gotten out of hand with Bethesda.
Yeah the romance thing needs a lot of work as one of the big parts of Baldur's gate 2 was the romance and how ultimately fleshed out and satisfying their conclusions felt. If Baldur's Gate 3 will have anything of the same level Larian will need to study how to do it properly.
