I loved the “netherworld” scene with Luke, Han and Leia. This, or a flashback, would’ve been a great way to have all three actors on screen together one last time, even if they needed to do a little digital trickery for Leia.

I also like the idea of Kylo/Ben losing his connection to the Force. His might be permanent here, but it would be a great way to bring down Kylo a few notches in order to grow a little more and maybe become more empathetic. It also can keep the good guys from being too over-powered in a way. Rey and Ben are obviously the most powerful force users, but having Ben have to help in ways that don’t involve the Force makes things a bit more interesting.

Right now I’m picturing your story so far a lot more like a novel than a screenplay, which isn’t a bad thing.