Push comes to shove, if there’s enough of you with proficiency you could make a mod.
Well I agree mods are a cool thing, to modify some minor part of the gameplay, reshade graphics, using some cheats... But players aren't supposed to improve the story and the quests themselves, that's the job of the studio. If we want to push it further, yeah modders can catch a free engine, write a story and code it if we want to push the idea to the extreme. But that's not the topic here.
That's the story Larian wants to tell to us. They ask us a feedback, we're saying they're some parts of the story that feels not finished, not polished. Here we talk about Karlach which is probably the most unfinished quest and storyline, but there is also Minthara that is heavily asked by the player to be more present even during the EA, and mostly all the endings have a lack of epicness and explanation. There is not a word about romances, very few words about the future of your Journey... Like you kill gods, archdemons, destroy full gangs, save millions people, and the next day you'll buy some milk at the market like nothing change before and after your play.