If I were to edit the original, Leia being his sister in the first place would go bye bye because it’s some of the most incredibly sloppy writing in the series’s history.
I actually could get behind that idea, especially since Leiah being a Jedi amounted to nothing. The biggest thing i liked about it was simply Vader using it against Luke.
I actually would be interested to see Han die in Empire also. Maybe Leiah and him already hooked up, so Kylo could grow up with out a father. Leaving him open to Palpatines mentor-ship, as Luke would fill the father role. Adding a touch of the growing up with out a father struggle.