I remember a story I heard about how Richard Marquand wanted the duel in RotJ to be bigger and more elaborate than the one in Empire, but George told him that wasn’t necessary. Ultimately, the actual sword swinging should be secondary to the character interaction.

I finally found that Richard Marquand quote I was thinking of.

"There was a feeling I had that I would like the (Jedi lightsaber duel between Luke and Vader) to be bigger than the fight in Empire. And then George said that it doesn’t have to be bigger, because basically it can’t be. George is very blunt. He said, ‘It’s just a couple of guys banging sticks against each other. Don’t worry about that. It is bigger because of what is going on in their heads. That is what makes it bigger.’

I don’t really know how to reconcile this with George’s “bigger is better” attitude by the time of RotS.