The kid FINALLY went down for a nap and I have a moment with a proper keyboard in front of me instead of a phone. I'm not going to go into too much detail, because I think most of the differences in how people feel about the characters or the different scenes stems from differing focuses or interpretations of the central themes of Star Wars as a series. But one complaint I do very much understand is one I've heard not so much on here but in different quarters out on the 'net or podcasts or whatnot. It is the issue of planning, or of central vision. The original trilogy definitely changed as it went along, but it feels like a single story, and most of the plot threads are borne out without getting dropped halfway. Lucas clearly had a broad vision of what episodes 4-6 would do, even if he really hadn't worked out most of the details in advance. The prequels were all pretty terrible examples of film-making, in my opinion, but they did at least have a core vision that ran tightly through all 3. There was a centrally managed and planned-out story in there, even if it was told badly (and very badly indeed).
This doesn't appear to be the case with TFA and TLJ. I think there are a couple key reasons for this. One is that J. J. Abrams was given pretty free reign with the first film. J. J. Abrams is a big fan of mystery and plot hooks, but if you look at his television works, he leaves lots of threads un-pursued. He gives you that 10% of the iceberg above the water and doesn't even bother to figure out the other 90% under it. As long as it LOOKS like there's depth, that's good enough. But Rian Johnson was also given a fairly free hand, and I don't think he was all that interested in pursuing a bunch of unresolved mysteries of the sort Abrams loves leaving out lying around. And while I'm sure Kathleen Kennedy, as current curator of the Star Wars main story line, has some idea of the tonal arc she wants these stories to follow, I really don't think she has a plan where the details and events are concerned. I suspect all she wants is an entertaining and relatively smooth transition away from the Skywalker arc to a new Star Wars universe with more freedom in terms of which doors Disney can open and turn into movies. So while the original trilogy wasn't actually that planned out in advance, it had a central vision, that being Lucas's. The prequels were definitely planned out in advance. And this new trilogy? Nope. Playing it by ear. So while I really enjoyed TLJ, and I think it's a great Star Wars film, and a very well-directed sci-fi movie in general, it isn't really that great an immediate sequel to TFA. But I don't think Johnson is solely to blame. I think Abrams is also to blame, because he is Abrams and does his little "Look how deep I am!" dance.
I do think TLJ picks up on some great themes from the series, though. Flawed heroes, failure as motivator, teacher, and opportunity, the battle against impulsiveness... In fact, I think one of the core themes of TLJ has to do with failure and impulsivity and their importance to maturation. A lot of folks complain that "nothing happens," which means that basically there are a log of things going on on-screen, but those plans constantly fail or are stymied, either by impulsivity or by dumb bad luck. There's clearly a lot happening, but real forward STORY momentum is slow. But TLJ seems to be a lot more about growing the characters and developing their relationships and motivations, helping them change from the impulsivity of youth to more thoughtful adults who understand sacrifice and greater causes, and the value of running away to live another day.
There's also one very important theme spelled out that I think may actually play a major role in the next film: