I was thinking about if some creative audio splicing could have Palpatine say “I made Rey” rather than Snoke and just leave it at that. The Rey/Palpatine connection is still pretty trite but at least it sounds more like a thing he would do and could remain somewhat cryptic, Rey as his literal granddaughter is just too dumb.
Well, officially his son wasn’t actually his son, but his clone. Not sure how that could be made clear with audio splicing, though.