Obviously, we need to make a list of thematic & plot issues and see which ones are worth prioritizing (obviously, prioritizing themes over plot, but still).

Looking over old post-TLJ fan theories, one idea I saw floated is that before Rey was born, her parents scavenged some Sith artifacts on Jakku, not knowing how much they were worth. Maybe they sold the Sith blade, and Ochi tracked it back to them. If you want to add onto that, maybe Rey’s parents were loyal Imperial Officers, but were forced into poverty after the battle of Jakku with no way off the planet.