OK, I've got a few minutes before I head off to work (retail blows this time of year), let's see if I can get most of this down.
I'll start with what I didn't care for. The basic plot structure in this movie didn't do much for me, as it basically amounts to an overblown fetch quest. That having been said, Star Wars is not known for having particularly spectacular moment to moment plot work, so it get's kind of a 'whatever' from me on this point.
On two viewings now and I haven't picked up a whole lot of new music cues, though the Rise of Skywalker track on the CD is pretty good. I was expecting a lot of auditory callbacks given that this is THE END so that didn't disappoint me too much. Once I get through the whole CD and match things up with the movie things might change. I'm sure The Soundtrack Show will get to it eventually (score fans should be listening to this podcast, btw).
Onward. I can see how people think that this movie is lifting a big middle finger at Rian Johnson's Ep8, but that's not how it came across to me. I felt more like it codified those decisions with the end of Luke's arc being that he recognized going into hiding was wrong and was able to pass that lesson down to Rey, because that's a character arc. Also, Chekhov's X-Wing, anyone? I am still surprised that it didn't get used in Ep8, but I always felt like there was no way we didn't get Luke lifting that X-Wing out of the water. I really feel like the whole Ach-to sequence paid off Luke's plot from Ep8.
The expansion of force powers in this movie is interesting to me, and I have thoughts. First, I think the whole force dyad thing is a concept that was born out of the connection Rey and Kylo were given in earlier films, expanded to the Nth degree. It occurs to me, though I haven't seen any official word on it, that the way they were able to interact physically while not in the same physical space is entirely due to their special relationship in the force. For instance, I don't think it would have been canonically possible for Anakin and Obi-Wan to have handed off a lightsaber in that fashion. On a similar note, Palps's mega force lightning I expect would only have been possible on Exegol (or Malachor, or Korriban, or Moriband) due to it being a place of concentrated dark side energy. I'm just spitballing here, but it feels right given what we've seen in the past.
I think my biggest disappointment is just that 20 years of EU conditioned me to want to know what happens after the empire was defeated, and it turned out to be "Well, let's fight the empire again!" I really hope and expect that whatever comes next breaks some new ground in regards to villainy.