not much to say. it's pretty much forgettable
I am not a hardcore Star Wars fan and I don't know much of its "world", but what I know is that Rogue One is one excellent piece of work. It is better than The Force Awakens (which I also quite enjoyed) in many terms - characters, cinematography, story, action and overall quality. It brings some fresh story and heartbreaking finale. Rogue One exceptionally well made eye candy movie, with substance that ends with the most emotional 15 minutes this year.