I disagree with nothing important happens. It fixes one of the biggest plotholes of the first movie and tells us why the Death Star has a weakpoint. I also think it does some good things regarding lore and world building. Showing rebels in a more shady/grey way instead of the "good heroes". I really liked the whole tone and atmosphere of the movie.None of the characters are memorable, the villain is a nobody, nothing important happens, the leads' acting is extremely uneven, and the whole story never needed to be told in the first place.