Just got home from watching this (I'm a major Star Wars fan, but for some reason I didn't feel any hurry to see this one). My quick summary is that it really felt like the side story it is. A movie set in the Star Wars universe, but not a "real" Star Wars movie. Some more detailed impressions:
- The characters were pretty terrible across the board. They were never made to feel like real people, there was basically no character development, and they didn't make me care one bit about them (which I guess is fine since they all end up dead anyway, but yeah). Jyn? Who cares. The rest? Barely remember them an hour after the movie ended. The robot was the best character in the main crew.
- The first half of the movie was really dull, mainly due to mostly focusing on those forgettable, unimportant characters (yeah, what they ended up doing is important to the overall Star Wars story, but they themselves are nothing).
- The second half of the movie was more fun. Some cool Star Wars space action going on there.
- Some people have been calling this a "dark and gritty" or "adult" Star Wars movie. I didn't really see that. It felt downright silly at times. There is the "all the main characters die" thing, I guess, but eh.
- The dialogue was generally really bad. I didn't hate it, but man, some of those lines. How out of place was the "little sister" one? There had been ZERO relationship development between those characters at that point.
- Some of the references to the old movies were fun, some were a bit much. Too many quotes taken directly from them, to the point where it almost felt like a parody at times. A lot of it felt a bit forced.
- Tarkin was incredibly obviously CG to me the instant I saw him, and I didn't know he was gonna be in the movie. Granted, I've seen IV many, many times, but I still can hardly fathom how anyone couldn't tell that wasn't a real human being. Was it good CG? For sure. But to me he still looked out of place among the actual human beings surrounding him. Leia was impressive (and I enjoyed that she was there), but again obviously CG. But she was in the movie for like 5 seconds, so whatever.
- Vader didn't sound quite right to me. I actually thought it was a JEJ sound-alike rather than the man himself at first.
- ...but Vader wrecking shit at the end was easily the best scene in the movie. Most badass he's ever been.
- The way the ending lead right into the beginning of ANH was cool.
- I somehow completely missed R2 and 3PO. I did see the cantina guys, which was fun but felt forced. Like, why would they be there?
Now, it may sound a bit like I didn't like this movie at all, but I did. It was an enjoyable action movie set in the Star Wars universe, serving as decent backstory for IV, but featuring completely bland and forgettable characters that I don't care one bit I'll never see again. Easily the worst of the good Star Wars movies. Better than 1-3, of course, but nowhere close to 4-7. I find it baffling that some people actually think this movie is better than TFA.