I find that taking out Rey palpatine leaves little to no personal stakes/conflict between the main protagonist and main antagonist since there is no personal connection.
But does there need to be a personal connection in order to have stakes and conflict? Palpatine wants to destroy the entire galaxy. That should be enough of a reason for Rey wanting to confront Palpatine, instead of a shameless ripoff of Empire’s plot twist.
Sure the Emperors ambitions of galactic domination are sufficient for an overarching conflict, on a character level though it leaves much to be desired. By all means I despise Rey palpatine as much as the next but taking it out of the movie without a substitute for personal conflict would make the film quite bland…me thinks.