Rey’s name in the flashback could be good.

As far as changing Finn’s line in the D-O scene, I think there’s a reaction from D-O that could be used to cover a line change if it was brief.

I’m feeling optimistic about this approach. The Clone Rey angle goes some way to explaining how Palpatine was resurrected, even if Rey’s connection to this is unconfirmed. I think a lot of people may be hung up on thinking that Palpatine is trying to engender some familial emotions with this story, but his bigger plan may simply be to set himself up as an obvious villain for Rey to hate, and in so doing allow him to transfer his spirit into her. It is only too convenient that he offers her a story about her parents that turns them from worthless nobodies into loving parents who only wanted to protect her, who died defending her from the evil undead Emperor. He knows he’s the villain, and all he wants is for her to be conflicted, to act out of confusion and fear rather than peace and purpose. Palpatine recognizes that Rey has always been in a hall of mirrors, trying to find her true family. The biggest change that we could make in this direction would be to show that Rey’s visions of her parents are newly uncovered, arising from her vision during her training. In fact, we could initially put the visions there, perhaps in truncated form, then let them play out in full during Kylo’s quarters scene.

I don’t know if we need specific proof that Palpatine is lying about this story, since one of its benefits is that it is plausible but unfalsifiable. I think someone like Finn should push back against this idea, saying that he doesn’t believe the Emperor’s story, and Rey shouldn’t either.