Well I saw the movie, and would like to share, and discuss my thoughts in the spoiler section for I'd like to go in detail.
First off I really enjoyed this movie, even surprising myself, for I'm pretty vocal about how much I HATED The Force Awakens, with many continuity errors, flawed logic, and poor/lazy writing. However Rogue One has very few continuity errors, mostly not self made (like by the movie itself), but from other things that are still a part of Disney cannon that weren't fallowed. Such as Kaiburr crystals used by the jedi were harvested on the planet Ilum, where in the movie they said it was a Whills temple (a beautiful reference by the way), but strongly implied it was a known jedi symbol, even going as far as to say they destroyed the last symbol of the jedi. Now this more just a point that could easily be explained, but any avid Star Wars fan should catch this.
Now the writing is also quite superior, my bet is simply more thought, and time was put into it, where TFA was rather rushed. Now for example dues ex machina was not used to further the plot, and really seemed to only be used once. Where it cuts out such things in it's writing only mild continuity errors, and not necessarily flawed in which the can no longer fix, forcing the audience to just go with it, there are some things that just don't make seance. From the beginning, why did the Death Troopers not have even simple life detection scanners like found on R2-D2? I know it's like "Why couldn't they build a boat on Gilligan's Island?", and in episode 4 the life detection equipment was large, but simple logic would be one is for like in the vicinity, and the other through thick hauls of a ship? On Jedha the make a jump to hyperspace while still in the planetary atmosphere, yes they do this in an episode of The Clone Wars, but it doesn't turn out well. This could be Disney simply changing the rules, and there is no use applying the real world science. The next one is pretty important as this one little ring put a shield around an entire planet, why didn't the Death Star Have one, and why did the 2nd Death Star need the shield to be generated from the moon of Endor? Oh, this was second continuity error, not things that didn't make sense, but pint still stands. Last is why is Leia in the battle? She was supposed to be getting Obi-wan, as said before the battle was launched, I suppose it could have been the fleet was scrambled, and she got taken in with the waves, but think of how dangerous that would be to take a member of a royal family, and member of the imperial senate to a loose all battle? Then if she had the plans, and knew it why go to to Tatooine? How they were fallowed out of hyperspace is another thing, but wouldn't the plans being safe be more important? How about the treads on that Tank? Talk about something completely non-syfy, seemed out of place to me, well at least from the bottom. It doesn't make sense how it wouldn't hover in a Star Wars movie, especially over even ground, luckily the walker came in. Last is more director vision I suppose, but notice accents are now in Star Wars, there are no accents in Star Wars, granted in the EU books there were, but in a movie that's hard to justify, for now you need to classify where they are from, and from then on all with that accent have to be from the same place. Again like TFA this movie is not written for the fans but for the masses, and majority will not care for any of these points.
Some more thoughts, and bits about the movie. In the new continuity the empire is no longer speciesist, but pretty heavily weighing on everyone across the galaxy, where as in the EU they were very heavy on non-Humans, not to say humans weren't oppressed to an extent, but this makes it so a the Rebel Alliance should have showed up much sooner, why 19 years? Also as seen on episode 3, they thought the empire was to be something great "This is how liberty dies, with thunderous applause", wouldn't you keep that image? Why mess with the commoners when ignorance is bliss? Just count the numbers, population of a galaxy (sense all are being oppressed) against an still Human only military? Voluntary joined up military at that, not drafted, the empire wouldn't be able to keep control. Although Star Wars was never good at numbers, one million clones defended the Republic (156,000 stormed the beaches of Normandy to put things in perspective). Next is more nitpicky in this movie, but the larger concept is annoying with Disney redefining the force, aspects can be seen in this movie, with "Trust in the Force". In the original Star Wars "May the force be with is was coined by Lucas to mean good Luck, not as a spiritual, or religious belief as it's made out to be, with it's constancy in this movie. This also means the general public knows more about the force than Lucas ever even implied, ergo Han in episode 4 should have been more receptive to Obi-wan talking to Luke about the force. Not believing, but knew about it, especially when he goes to say he's been all over the galaxy, and never come across it. Being more a question, why would Darth Vader's castle in what is now the cannon location be what clearly looks like Mustafar? The place where he lost most of his humanity, and believed he killed Padme, a bit weird. The new fighter designs, were kind of cool, seem meaningless, along with the new trooper designs, seems like a way to sell new merchandise to me. Ship designs especially as under Disney they can easily maneuver around in an atmosphere, so shouldn't a TIE fighter? I also miss the prologue, but I guess it's ok not to have it.
Seems like a lot of bad, but I think the problems are just more complex to describe. However most aren't huge, nor plot holes, heck it actually made episodes 4-6 make more sense. Like why there was such a simple fatal flaw in the Death Star Design, why the first Death Star took 19 years to complete where 2nd twice as big Death Star took a max possibility of 4 years (where's all the Kaiburr for that one from?), and why Leia just happened to be by Tatooine (well, to some extent). The feel was better, probably just the more iconic things to see grounding it in Star Wars, where again TFA failed to mix old, and new. Such as seeing Tarkin again, was happy to see him, though might have been too much, for his face isn't going to age well. Vader was even the cool Vader that seemed lost in the EU, in the fight scene he started as the stalking around Vader seen in 4-6 doing nothing special, but then it was like he was teasing everyone as he unleashes himself upon them. Personally I don't like music, never have, but in Rogue One it felt more like something of a Lucas made Star Wars. Sadly I didn't find it the War Movie we were promised, but just a non-Skywalker tale about the war with the Empire. Not as dark, nor gritty as they originally built up to be, but what do you expect from Disney? Overall definitely a step in the right direction, and shows that Disney can handle the franchise to some extent anyway, something for me personally to have some hope in the future of Star Wars, for honesty if I hated it that would have been the end for me, but it can have more chances now, I look forward to the Boba Fett movie. However if you like the new cannon, there are decent books, I don't think they're necessarily bad per say, just not as deep, nor complex as the Expanded Universe, for they're written for mass appeal, not zealous fans.