Story and characters are secondary to gameplay and mechanics. It's a videogame, not a novel (or even a movie).
That being said, I don't think Larian are the best story tellers.
This...
I wouldn't want an RPG game in a DnD setting to have a very rigid story like that of Last of Us. That'd be amazingly bad.
Gameplay and player choises should trump any story in a gmae like this.
