After learning Palpatine was still alive and manipulating things like he had before, I felt it was a mistake for them to not double down on Rey Nobody. Imagine after all of Palpatine’s planning and machinations, that a total anonymous girl would come in and bring it all crashing down. Palpatine was using Ben Solo as a pawn, just like his grandfather, and someone he could have never predicted showed Ben he actually wasn’t alone.
Luke and Leia knowing who she was, but not telling her, raises so many questions. Are Luke and Leia any better than Ben Kenobi and Yoda manipulating Luke and not telling him the truth about his father? How are they any better than Palpatine, who manipulated a Skywalker to accomplish his goals? Leia had plenty of opportunities to tell Rey, but she didn’t.