Hal 9000 said:
Having Rey kill her parents would fill the dramatic void left by her evil heritage, shown through visions and maybe even Rey saying to Finn “I killed my mother… and my father.” She tells Kylo Ren she knows what she must do when he reveals this, which I would think should lead into her self-exile rather than continuing the mission of trying to get to Palpatine.

Glad that you’ve come around to this.
Rey going into self exile after the reveal makes more sense in this narrative and would help the film of the film, problem is that I don’t see how we could make it work. First problem is that she arrives on Achto in Ren’s Tie, Second is that you’d have to cut the death star scene since she takes Ren’s Tie to Achto, and you can’t have the transition of her leaving the death star to her traveling to Exogol since she uses Luke’s X-Wing in the latter.