More consistent = Luke starting on the Light side on Dagobah and then becoming Darker.
You see the darker Luke entering the palace. And the rest of the action… it’s borderline dark side.
The same with using the Ewoks later on, again a bit dark. And the going to Vader (killing the Emperor is still killing), etc.
This linear progression also makes the audience wonder. Will Luke return to the light side by the end of the movie?
For me opening on Dagobah kind of spoils it.
It’s as if Luke goes dark one day, light the next, then dark, … 😉