Agree in part. Unlike the space battle in Revenge of the Sith--that was a bit cluttered--the battle scenes in ROTJ didn't go on long enough for me. I'd really like to see Excecutor's swan-dive done with today's effects.
ROTJ would have been perfect if it were above a fully Imperialized Coruscant instead of Endor--so Death Star debris could be seen raining down and city scapes levelled that would turn back into green spaces over time.
If you want your mind blown--find this magazine:
https://www.amazon.com/Terraforming...breeding-Biochemical/dp/B00L8AZRSQ?tag=vig-20
Take a look at the interior of a Dyson Megasphere.
Speaking of Death Stars:
http://www.kschroeder.com/my-books/sun-of-suns/engineering-virga
Huge bubble for space
http://www.nextbigfuture.com/2017/01/single-soap-bubble-made-on-earth-that.html
Death Star do-able?
http://www.nextbigfuture.com/2017/01/technology-for-making-death-star-sized.html
"Very funny, young man - but it's trusses all the way down"
Yeah the super star destroyer dive is the only part of the effects that lets things down. I'm surprised they didn't redo it for the special editions.