I just found this
https://www.youtube.com/watch?v=u5sdztM-p98

Interesting. Edwards talks about how the film is about “the formation of the Rebel alliance,” which isn’t really true, is it? I wonder if the original conception was closer to that. Would make sense having Cassian being a recruiter in that version, bringing together all these different people and sects of the Rebellion.

The other thing that just occurred to me, adding X-Wing stuff could easily refer to the assault on Eadu, too, which was probably added with the Galen assassination storyline.

One other thing that I’m not sure on is whether Rogue One’s mission to Scarif was originally sanctioned or not.

Anyway it looks like anywhere from 30-50% of the film was reshot.