Sorry, but I don’t really understand that complaint (about Rey killing Palpatine). What was Rey supposed to do, say “I won’t kill you because I’m good” and hope that Palpatine spontaneously combusts? Luke had Vader to help him, Rey had no one there for her. I don’t see how it violates Lucas’s saga if killing Palpatine was literally her only option.
Regardless of how the larger saga portrays the Jedi ideal, even within this film it doesn’t make sense as a resolution. Palpatine wants Rey to kill him, and she proves him wrong by… doing exactly that.