SpenceEdit said:
friend: You changed the ending?
spence: Yep.
friend: Did you put Sebastian Shaw back in?
spence: Nope.
friend: What?!
spence: I didn't put anyone in. There's no force ghosts.
In the early drafts of Empire, Luke found the Kaibur crystal which lead him to Yoda. It would be interesting to see something like worked into an edit to eliminate the force ghosts.
I wonder of Ben's ghost in Empire could be reworked into a hologram...