While I’m satisfied with what we got, I agree that creating Rey instead of being blood related would’ve been a more satisfying connection to Sheev in terms of the whole saga without discrediting the chosen one thing. And while I love Sheev in this film and I’m completely okay with reviving him for this movie, I also think more people would be on board with this if they got Darth Plagueis to be the one who created Snoke to puppeteer. Even if Rey was still a Palpatine, having Plagueis replace Sheev in this movie would mirror Sheev’s role in the saga. While Sheev kept turning pawns until he got to Anakin and eventually tried but failed with his greatest apprentice’s son, Plagueis would have turned Palpatine and had Ben Solo be a pawn until he tried and failed to turn his greatest apprentice’s granddaughter.

I like to imagine they thought about that but went with Palpy instead because of general audiences being really confused.