I like it! Well, I’m still not sold on the Dyad, since there are already a lot of terms being thrown around here like ‘genetic strand-cast’ that may confuse a general viewer. I think it’s enough for Kylo to say something to the effect that Rey was originally meant to take the Sith throne before Palpatine’s spirit returned in the rotting clone body, so she’s fulfilling her destiny by killing him.

And Snoke being one of the first experiments is also a good idea! Maybe he was being tinkered on by Palpatine before he died as a backup plan, and when the Empire fell Snoke took over the First Order while the Sith cult began work on bringing back the Emperor with the surrogate clones.

Maybe the biggest benefit of this whole idea is that it circles back around to address the most inexplicable aspect of the film…“Somehow, Palpatine returned.” Now Rey’s backstory serves as a direct answer to the question of just what sort of Sith science was involved in bringing Palpatine back to life, connecting TROS with the rest of the trilogy.