Agree that Rogue One was both better and much darker than I was expecting. I love how the whole movie was encapsulated in a brief line in the Original Star Wars movie and gave a rational reason for what I had seen as an inexplicably weak plot point- the fatal flaw that allowed the Death Star to be destroyed.

Ended up watching a Japanese movie on TV late one night that I knew nothing about and was shocked how it went from slow paced and mundane to horror that had me literally saying "Holy crap!" out loud. That movie was "Audition." The less you know going in the better. Prepare to be traumatized.