I will only accept karlachs current endings if they change all the other companions endings to be equally cynical and ''bittersweet''. As it currently stands, and this has been discussed to death already, her story feels disjointed from the setting the story takes place in to the point of being ridiculous and forced(the fantasy equivalent of heart transplant surgeries dont exist in dnd apparently lol), so larian has to remove all the ''magical ways'' the other companions get good endings to make the story more cohesive and realistic!
Being mostly sarcastic. Mostly. But also with all due respect, saying that if karlachs story got changed it would cheapen the current endings is bullshit. Karlachs quest needs to be given the same amount of polish that the other companions get, where her story isnt just railroaded into the same ending regardless of our actions. And hey if karlach indeed did get a more polished quest line where we can more meaningfully roleplay what path her story takes, people who wanna experience the ''we did all we could for karlach™ ending for karlach are still free to do so. I personally dont like when a game set in a dnd world forces a sad ending on me telling me theres nothing to be done while everything and everyone else in the world can be fixed to an outrageous degree(gales magic nuke in his chest being just one example), but maybe thats just me.