Also the fact that Rey only exists because Palpatine and the Sith Eternal let Palpatine’s non-Force-sensitive clone have a natural-born child in the hopes that they would be Force-sensitive and a worthy host for Palpatine’s spirit unlike the original non-Force-sensitive clone.
Yes but clearly he wasn’t relying entirely on that. It was a Plan B. He played most of his hand with Kylo. And who wouldn’t want a piece of that “mighty Skywalker blood” anyway?
In ROTS he says that Anakin would surpass even himself (pre-multilation). So he probably realizes a Skywalker is potentially more powerful than even his own bloodline.