Within the context of this story, having Rey actually be a part of the Skywalker bloodline would be handing her the conclusion of her character’s journey on a silver platter far too soon. As much as Rey Palpatine sucks in a lot of ways, you do have to admit that the concept of the Skywalker twins readily accepting the offspring of their arch-enemy as their own is quite emotional. It’s the only thing I can think of that feels Star Warsy without retreading old ground or overcomplicating things - and believe me, I’ve given a lot of thought to this!
Hal, I’m still a little confused on where exactly Kylo’s line about the dagger is supposed to go. Is it replacing: “Remember them. See them!”? If you could indicate what would be replaced, then I could see about generating some options as for what he could say.