I think that runs counterintuitive to how the concept of the clone body is presented, though. The reason it’s crumbling away is because of how many Sith spirits are present within it. Artificial lifeforms clearly aren’t cutting it when it comes to Palpatine’s spirit, just take a look at Snoke, too. Whether he always had those other spirits within him as a part of the rule of two or if they were summoned along with his own spirit from Force hell is irrelevant. If he portioned a part of that off to Rey from across the galaxy (which seemingly should involve a ritual with both people present), he should actually deteriorate LESS. But then he would have less power, and a potential rival, neither of which is in his character to desire. The reason why the idea that he created Rey and Anakin as raw Force beings makes so much sense is because he’s trying to find a person that has enough potential with the Force, and specifically the dark side, to accept all of his Sith spirits without instantly withering away. For a more detailed description of this concept, read Burbin’s last post on here.