I agree with pretty much everything here. The problem with the Avernus ending is that you don't keep "pushing and pushing and pushing" her to go back there. You decide if she goes during the very last cutscene. To frame the Avernus ending as a bad ending where Tav is a manipulative, egocentric dick that only cares about their feelings, not really thinking about their romance option / companion interests, it surely needs a build up or something.
Originally Posted by Rae
Exactly, I said the same thing from the first day I registered here. With game where everything is possible and with 17000 ending with so many clues and possibilities to fix her I'm 100% sure, that something wrong happened during the development so at the end we have such a unfinished and very empty questline without proper ending. The question is. Will they improve it? And if yes, when?
So I kind of think what happened here is that they had a more substantial questline planned for her with an ending where she gets saved, with the death and avernus endings being the bad endings. Then as release got closer and things started being cut and it became clear that they wouldn’t have time to implement the good ending, the less-bad of the two remaining ones was hastily shoehorned into the good ending role. IMO this explains the weird tonal inconsistencies, as well as the reason why going back to avernus is never presented as a real option up until the very end.