Isnt he already doing that though?
Remove droid torture in Jabba’s Palace
Remove “Jedi Rocks” and the additions of the Special Edition in that scene
Remove the slapstick Ewok moments during the battle
Add more rebel troop action to Endor ground battle
Larger ground and space battle
Remove Chewie’s Tarzan yell
New Boba Fett death
Remove many of C-3P0’s “Ric Olie/ captain obvious” lines
This is true but I beleive this is becuase, unlike the first two which had simple plots and themes that kids could follow, ROTJ had more “kid moments”. Which could be fine however, there is A LOT of them. So many they tend to happen before and after major emotional/plot heavy moments. This juxtapose tends to pull everyone out of the story including kids (which I can atest to, having been one not to long ago, I grew up with the prequals).
They seemed intent that kids would find the plot boring or that perants/censors would not like their kids seeing “dark” moments, so put a something jokie in there to soften the blow. But ROTJ was the movie remembered least of growing up (except perhaps AotC) with RotS and ANH coming in first. RotJ just never stuck and I tended to zone out.
To be clear I’m not arguing the movie should be “dark” or more serious but just that I think Adywan is seeking to remove most out of place humorous moments that don’t fit the tone of the scene they are in/before/after.
TLDR: Even though SW movies was designed so that kid could watch them (“for kids”) RotJ might have gone to far by following the trend of ‘Kids are too stupid to follow plot so, “fun moments” are needed everywhere!’
Also George Famously discovered the delights of toy sales…
What really happened was after Raiders of the Lost Ark, Lucas got disillusioned with the film industry believing that audiences only cared about thrills and entertainment and not about the story.
This is just one of the many things that led ROTJ to become what it is now.