Fair point.
I still think we'll get to turn her over to the Elfy side of Thedas. At least partially. When she's a bit more stable. In a DLC.
I mean, I'm fully behind the theory that her state of mind is just too fragile for her to accept it's not the way the Chantry fed her her entire life.
When she's a bit more OK, she might accept the Creators, Forgotten Ones, and the Dread Wolf. At least, you know. Accept, as in respect people who believe in them, if not start herself. She did see Mythal.
Considering the post-credits, it's... complicated on that front. I just wish Sera got wind of Arianne going through the big damn door to find Morrigan's son, and followed her through. Then she would KNOW for sure.