Ya know what's crazy? Gareth Edwards had a mere two movie directing credits to his name prior to Rogue One - one of those an R-rated sci-fi monster film, the other a (slightly) more gritty - action styled Godzilla flick. He's 46 years old, having been born 2 years prior to the release of the original Star Wars. He calls Lucas, Spielberg and Tarantino his favorite directors.
Star Wars is timeless - even though two of those movies have earned PG-13, I don't think anyone would say they're "hard PG-13." (It's not like the last X-Flick where they throw in an F-Bomb, just because "well, we're gonna get a PG-13, we may as well really earn it.")
If Disney is stepping in to "lighten" the film up a bit, I don't really have much of an issue with it. They're protecting their brand and keeping Star Wars family friendly. There's nothing wrong with that.
The issue might be - what was proposed to them? Did Edwards (and team) pitch the film they delivered (not that it was finished - but, based on advanced exec screening) and received an okay for?
Is Disney getting cold feet? Or Did Edwards go a little more hard PG-13 (or more) than expected?
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The above is based on the idea that Disney did order some dramatic changes to the film. I know there's conflicting reports - at this point, my personal belief based on plenty of continued reports, is that Disney is running a bit scared and has mandated these changes to Rogue One. We might not know what really happened - is it 40% (I'm now hearing even as much as 50%)? is it just a few pick ups? More character interaction?
With 6 months until release, there's still a lot of work to be done on the movie.
*Not that even Lucas had much in the way of credits - or Kershner or Marquand.