Again, I discuss this a bit in my commentary, but Luke is too often told what to do throughout all three movies. Removing the force ghosts means that, once Yoda dies, he's essntially on his own. There's no dialogue about this, but hopefully that feeling is conveyed. It's just him now. The last of the Jedi. And he has nobody to help him.
Just got some of the shots from Bob last night. Awesome sauce. They look great. He's got two more to finish and then the movie is ready.
I should be able to finish up the bonus features over the next two days. March 1st is looking good.