I think that R1 is strikingly similar to a comic book movie, and I think that people who regularly watch those movies - not me, as I find them almost interminably boring - will have internalized the tropes of those movies enough to very quickly pick up on the signals in the action. They spent the first hour assembling a team of quirks and types, not necessarily developed characters, and then spent the last third blowing shirt up while the quirks/characters carried out the convoluted steps of a mission I had long since lost interest in the particulars of. The movie is basically a Jyn Erso origin story. I guess you could say the same about "A New Hope," but it wasn't as choppy. We spent a long time on Tattoine, and our introductions to the other members of the team, Han/Chewie and Obi-Wan, came through Luke. In a post-"Avengers" world, we would have needed 15 minutes of Obi-Wan brooding in dark shadows.