Not to be dismissive, but I don’t love the clone idea for the sheer fact that nobody in the movie ever talks about clones. It feels like such an arbitrary change to me to then have an entire movie after the reveal that thematically and through character dialogue completely ignores the idea of cloning or Rey being a clone. It would just feel way too incomplete and way too much like a fanedit for my tastes.

Say what you will about Rey Palpatine, but atleast there is material there to work with.