I’m really uncomfortable with this idea that Rey being as strong in the Force as Killoren supports Reheelo rather than Rey Skywalker/Solo. I mean, does that strike anyone else as uncomfortably eugenic? Of course, the idea of a kind of divine lineage (which just happens to be white/white-passing) deciding the fate of the universe already lends itself to illiberal interpretations. See David Brin’s “Star Wars” despots vs. “Star Trek” populists on this point.
However, the idea that Rey is Force-destined to marry Kul-de-sac, a man she hates, so they can have a new generation of super-strong Skywalker babies takes this already problematic premise to new and disturbing lows. Rey’s own feelings of disgust and pain from her interactions with Kal are brushed aside or outright romanticized in this process, making the way this pairing is shipped frequently misogynistic as well. And let’s not even get into the blatant misapplication of the concept of a Force bond making them love each other against their will. The Force is not a date rape drug, damn it.
If Rey is a Skywalker or Solo, on the other hand, it makes sense within the existing canon that she would be as strong in the Force as her cousin or brother. It also preserves the recurring theme of choice, that one’s moral choices matter more than blood, making this canon palatable. As others have pointed out, Rey and Krill being the opposite ends of Anakin Skywalker’s legacy both underlines that theme and neatly ties off the three trilogies. To me they’re the only parentage theories that make thematic sense and make for a satisfying conclusion.