This kinda lines up nicely with the timing of the Cloning Palp Storyline from BB. Right after Anakin becomes uninteresting as a host via barbecue, Palps starts the Clone project.
Yes, this is my intention. Palpatine says to Yoda that Anakin will become more powerful than either of them, but then when he gets burned to a crisp he loses a lot of his potential. His cloning projects would explain why he isn’t bothering with creating more life again, because it’s the far safer option of the two. Then Luke shows up and his plans change again. He dies anyways, and makes Snoke who falls apart and inhabits a clone which is also falling apart. At this point he realizes cloning isn’t viable, creating Rey (if that’s your interpretation) and starting to groom Ben into Kylo.
As for the japor snippet, I really wish it was simply in Kylo’s quarters in reality. I’m not sure if it belongs in that vision since Palpatine’s hands are in that in some ways. In an ideal world, he is simply keeping that artifact in his quarters with the rest of them and brings it with him to Endor to give to Rey. Then we could have a shot of him clutching it before/after Han shows up. And we could place it between the twin’s lightsabers that Rey buries on Tatooine. In other words, I don’t think this is particularly feasible without people willing to contribute VFX.