At some point the farm boy from Tatooine needs to grow up and make his own wise decisions. And finally he did—-when he projected himself across the galaxy, sacrificing his life. Having Ben or Yoda or whoever pipe up and guide him at that point would undercut his final arc.
I think it’s worth a try, if it’s executed well it would be a nice addition.
I don’t see any way it could be executed that wouldn’t feel like it’s out of left field and entirely unnecessary. But again, I’m willing to keep an open mind about it if someone gives it a try and it works. I just don’t see how it could.