The Mustafar duel is overrated. About halfway through the fight, it stops focusing on what’s going on between the characters and becomes overly focused on the visual spectacle of the location itself. And of course, the whole part of them swinging from cables and riding on a river of lava is way too over-the-top.

I think George knew it was going to be his last Star Wars movie, so he probably wanted to go out with a bang by having the final battle be really grand and flashy, but he overdid it. The final duel in RotJ didn’t need to be flashy, because it was focused on the characters and their internal struggles rather than the environment they were fighting in.