I’d probably just drop the whole “Rey parentage” mystery altogether and make her explicitly a Solo. And I’ve give Luke a son named Ben. And in general, I’d try to keep the Solo/Skywalker family close to one another and show a strong sense of camaraderie between them. That’s something that’s been sorely missing from the canon. By the end of RotJ, those characters are really close to each other, and that should be carried on to the next generation. Kylo Ren (or whatever I’d call him) would be the one exception to this. It would make his going astray feel more impactful if the rest of the family is together and functional.