I hate this notion that it should be "fixed" by making her more poly. That is not the fix that I want at all. The relationship with Seluneheart as it is presented in the game is HEAVILY implied that she wants something monogamous so if anything is changed there should be a conversation you can have with her about staying monogamous together that she happily agrees to or the shit with Halsin is just removed altogether.
I'm not asking for her to be more poly. I'm talking of what is already in the game. If they don't gonna remove it, at least make it in a way that makes sense with the character. I'm not asking for extra poly content for her.