I found it interesting in that the significant loss of Rebels during the Scarif battle, including all of Rogue One, Blue Squadron and a large part of the fleet (including the flagship) made it seem more of a pyrrhic victory than an all out victory. Certainly the opening crawl of A New Hope made it look better than the outcome of Rogue One:

"It is a period of civil war. Rebel spaceships, striking from a hidden base, have won their first victory against the evil Galactic Empire.

During the battle, Rebel spies managed to steal secret plans to the Empire's ultimate weapon, the DEATH STAR, an armored space station with enough power to destroy an entire planet.
The cost in obtaining the Death Star II schematics and the Emperor's plans to be present were clearly alluded to in RotJ when Mon Mothma states that "many Bothans died to bring us this information."