I'm not sure I even consider returning to Avernus as the "good ending" as it's essentially returning the slave back to the master, sure she has Tav, but it also robs her of freedom and the life she wants to lead.
I'm not expecting something done immediately, but I am hoping they're seeing this feedback and will work to somehow give us a chance at a happier and more satisfying ending, even if it only comes with a "Definitive Edition"