I mean if they want to create some miracles then sure go for it, I just don't think it's necessary. Since all of this began I heard that "not every character is equal and not everyone needs happy ending" from people who defended her ending. And while this is just absolute nonsense I on the other hand think not every questline needs to be equally long and complex. It's even fitting for her to leave the story as it is, and just add option to fix her. She's a really straightforward character unlike Shadowheart or Astarion, her questline is just a journey to fix her heart so she can live a normal life and I don't think there's anything wrong with that (except for the fact you can't accomplish your goal). If they want to add epic fight with Zariel for Karlach's soul im more than cool with that, but as for now, just stealing the tech from Steel Watcher is enough, so me and many other players can actually enjoy the questline we put an effort and time into. Because if stealing the tech from them is enough there is nothing wrong with that, and would fit into an already existing story
