I am a huge fan of your Hobbit edit and I’m glad you took on this project.
With that said, I’m concerned that in its current form, it turns Rogue One into the caricature everyone thinks it is - emotionless empty Star Wars-themed action sequences. I understand that the point of the edit is to narrow the focus onto the battle, but the battle was not the best part of the movie in a vacuum. The character deaths and other surrounding scenes lose all emotional weight without at least part of the rest of the movie. I’m not sure it’s doable with your concept and it’s not very Star Wars-y, but I think small flashbacks introducing the main characters could help. Perhaps a fast “Greatest Hits” of the first 2/3 of the movie or something similar to your Dol Guldur edits.
The dialogue and music lifted from other movies stands out like a sore thumb. I could tell exactly where each piece came from, and a lot of them were really on-the-nose, like the Battle of Hoth music during the AT-AT’s appearance, and the Executor crashing for the Star Destroyers colliding.
Personally I loved Giachino’s score and I feel it’s unfairly maligned, but I know others don’t share that opinion. At the very least though, I recommend you use music from more obscure sources as others have suggested.

On the positive side, the editing is all well done. The transitions between scenes and the audio are all seamless. I really enjoyed what you did with Jyn’s inspirational speeches. You made her seem like a leader among the rebels, moreso than in the actual movie, by subtraction.