Reading through this thread and looking over the results of the TROS poll got me thinking about the idea of having Rey be responsible for her parents death. I know that keeping Rey as Palps granddaughter is a less popular option than Rey Nobody, but if an editor were to have Rey kill her parents I think the Rey Palpatine angle works.

This way we keep Rey’s parents as good people who were doing all they could to protect their daughter, and in a fit of uncontrolled childhood rage, she causes their death. When she accepts the truth of this it would serve to compound the feelings of inner conflict and fear she has regarding her own power