At the risk of mixing metaphors and reading as a scratched record Star Wars as Dune lite takes some of the really clever ideas of Herbert and returns them to their more traditional narrative origins.

Herbert doesn't have ghosts but invading persona's from the (then fashionable notion) genetic memory of the drug enhanced and intensively trained minds of his eugenically conditioned characters.

Or they are clones that recover the memories of their previous incarnations in much the same way (sort of like Ripley 8 in Alien 4).

In terms of story mechanism it's still a ghost but it gives a harder science fiction explanation as to how the dead come back to interact with the living.

If Leia like Alia were to be tormented by an evil Grandfather figure she conspired against and helped kill, it would be an actual ghost not a split personality.

I have no problem with that as long as it's a genuinely frightening ghost story and not just a transparent red haloed return of the character as he was alive.

I agree with Harmy, Ben sitting on a log and delivering exposition was one of the dumbest moments of Star Wars.