You could also consider removing the Leia line to Luke where she always “knew” she was his sister. It was over the top in my opinion. There was another fan edit that apparently incorporated lines from Battlefront between Luke and Boba.
My edit of ROTJ handles it like this:
Opens with Luke on Dagobah, talks with Yoda, Ben’s scene is cut, it really doesn’t do anything but regurgiate a lot of stuff already said, some of it spun.
Key thing is that Luke does not know that Leia is his sister.
Then various trims throughout the rest of the film to reflect this.
NOW, like in TESB, it’s Vader who initially sleuths it out via the Force in their duel that Luke has a sister, in TESB Vader revealed he was the father, now in ROTJ he reveals that Luke has a sister.
Gives Luke losing it in the battle a bit more oomph.
The movie now ends with Leia intuiting via her unfolding relationship with the Force that Luke is alive and her brother.
Much more organic.