That was part of my point, everything that would lead to it or make it feel natural is getting further and further away. With Emmy it happens right when you remember who she is and you can keep your promise to her, or you can protect Aine and all the girls.
Seems like Gwen's ending would need to be added to a previous point meaning most player right now have past it and would need to backtrack, or it would be harder to fit in. But again, not against it, even if it ended being something that needed to be back tracked for, after all replaying the game would be no bad thing,
or ended up having to be put in some other way.
I believe Niichan is good enough to find a way to make it work if that's the goal and they feel it would fit. It's more a issue of me being able to see it is all.