I wonder if it would be possible to brighten up the lighting of the space battle at all. The space battle at Scarrif in Rogue One was simply spectacular because of the bright lighting - it looked just like the brightly lit shots you see from the ISS. I realize you could explain it away that Endor’s sun is just a dimmer star, but the RO battle was so much more vivid and realistic looking. ROTJ’s battle looks dingy and unconvincing in comparison.

Also, when the Death Star opens fire on the rebel ships, I always thought that the beam should pass right through the vaporized ship and keep going, rather than simply disappearing right after making contact. It would make the laser look much more powerful.

(Also +1 for a K2!)