I’m convinced the only reason JJ made Rey’s parents noble is because he needed a reason for her to WANT to kill Palpatine in an angry or vengeful way.
Thing is, arguably he has done a lot more than that to mess up her life (corrupting Ben, indirectly killing two of her father figures, calling for her execution, etc.) So it isn’t exactly necessary, per se.
Still, I would prefer it to remain intact, at least in this version of the film we’re making. That way, when Palpatine says she is taking her revenge on him in the ceremony some casuals in the audience don’t think, “For what? She should be glad he killed her parents!”