Much agreed. The idea that Rey feels responsible for the death of Leia is pretty astonishing - way more impactful than the Chewbacca fakeout. I’d have to see if there is a way to implement such an AI line later on. “Leia died because of me”. I also think Leia’s last energy being put into Ben physically rather than just so he can see her one last time is much better. I was thinking about it last night, and it actually also explains why her body doesn’t vanish until Ben dies.
Granted, it wouldn’t explain why Ben’s body vanishes despite putting all of his energy into Rey. But maybe that can be handwaved with the whole dyad thing. Plus, it technically means that the life-force of Leia is living on in Rey along with Ben.