Cut the flashback entirely. The films are stronger if Rey’s parents were a couple of drunken assholes.
I agree, I like the angle where palpatines son could have been disgraced by everyone due to his fathers actions and became a drunk, maybe kylo can say something to alude to that, or maybe make him say “I didn’t lie to you, they sold you for drinking money” I think it keeps the palpatine thing but doesn’t entirely discount the last film