Yeah, I think things generally make more sense in a Rey Nobody edit if Palpatine tells Kylo about the dyad, and his plan the whole time is to use the two of them to rejuvenate himself. It builds on the whole ‘darkness rises and the light to meet it’ idea from TLJ rather than retconning it entirely. It’s not like the theatrical cut makes any attempt to explain why or how Kylo knows they’re a dyad, iirc.
Unfortunately I think it’s difficult to cut around the whole ‘kill me and let me steal your body!’ bit of the movie. I’m interested to see how Dom handles that. Also, if Palpatine doesn’t explicitly want Rey dead, then the difference between Kylo’s plan (“Let’s go kill him and take the throne!”) and Sheev’s plan (in this idea: “I’m going to trick him into bringing Rey to me so I can suck the life out of them!”) is less clear cut.
Yeah the scene where Kylo learns about the dyad was the oracle scene, which was cut from the final film, so the theatrical cut gives no explanation as to why or how he knows about that.