Bingowings said:

The returning to Yoda has already happened, he did it straight after getting better to prepare for rescuing Han as a fully trained Jedi.

Yoda lived long enough to finish his task.

Han is on Tatooine so having Ben deliver his lines on Tatooine makes sense, he is showing Luke that their is even more at stake saving Leia from herself than just saving his friends.

In the wrong hands Leia could be just as much a threat as Vader (or potentially Luke).

As long as we see Luke on Degobah first, I could get to love this idea.

If it weren't for the "Leia is your sister" stuff, I would drop the Ben scene altogether as it adds zero drama while it drains a lot.

The whole problem with this "Saga" is that Darth Vader and Anakin were not created to be the same character and everything that comes afterward is trying to retroactively fit together stuff that was never there. Vader is so much cooler as a villain than he is as a tragic figure. This movie would have rocked if we learned Vader lied, that Vader actually killed Luke's dad and that now Luke wants to hunt down and kill the old bastard. That would be a stronger way to see Luke turn away from the Dark Side. So as long as we're wishing, I wish for that. :-)