I got to see the movie the other day, and I'm still processing some things. I haven't quite decided on a letter grade, but I do want to share some of my thoughts:
Good stuff:
I enjoyed seeing Rey progress in her training and having to confront aspects of the dark side, particularly her anger. It would have been nice to see Evil!Rey pop up a few more times, even just as as a force vision, so Daisy could have fun doing both aspects.
I really enjoyed seeing the wrecked throne room with some of the ROTJ musical cues; I probably consider that my favorite sequence at the moment.
Stuff that's less good:
I agree with some of the other opinions regarding some things. The pace of the movie is a bit too frenetic and doesn't take the time to fill in some details that are interesting and even (IMO) essential to the story. I don't mind that Rey happens to be Palpatine's granddaughter, but why weren't her parents given more to do? Why didn't Palpatine's son follow in his footsteps, and why would the Emperor seemingly allow him to run away (however temporarily)?
In the last movie we saw that Leia apparently couldn't get any real military support against the First Order, but Lando apparently got hundreds of ships in a very short span of time? As much as I love both Lando and huge fleet battles, I admit the splash shot of the cavalry fleet actually seemed too large to me. And I rarely say that sort of thing.

Clearly, Leia should have just called him in the prior movie.
I also have some issues regarding ideas that looked good on paper but are just poorly executed IMO. Threepio's memory wipe is one of the worst, as it seems a bit disturbing to me that his friends just want to hack into his mind for the information when they know it's both intrusive and potentially harmful to him (it would make him lose his essential personality... which lasted a short time anyway). I can see where Palpatine or someone else connected with the Sith would have put in a programming barrier, but I don't really like the sequence as done in the movie. It could have been handled far better.
I'm mixed at the moment regarding some of the more exotic Force abilities we get to see. While it's true that many offscreen sources have expanded elements of Jedi training and mentioned specific powers, some of the stuff like the teleporting necklace/lightsaber seemed a bit too much for me. I'd need to watch it again to form a better opinion. I don't think that doing things different is always bad, but how it's executed makes a difference. Even Rey unwittingly using Force lightning felt off to me, because I tend to see that as more of a trained ability (and one more tied to the dark side than the light), but YMMV.
Maybe the Force doesn't work so well with clones? Or its connection somehow decreases?
This was actually addressed when the Emperor was brought back for the Dark Empire series. He had learned how to effectively merge his essence with the dark side, given him an incredible amount of power, and he was shown created "Force Storms" late in the comic which sucked in stuff around them. But he also learned quickly that this degree of power, which was very addictive, was also highly destructive to organic bodies. Palpatine began using clones to sustain himself, because if his essence became disembodied in the dark side without a vessel, it would be like an eternity in negativity and pain. An endless torment where he couldn't escape the pain and couldn't influence anything in the outside world. Having a physical body, if only temporarily, allowed him to channel a lot of the dark side while avoiding the worst aspects of it.
Ideas and execution are two different things. I have no issues at all with the idea of Palpatine coming back. I don't even really care that there's not a great explanation for it. I accept "The Dark Side of the Force is a pathway to many abilities, some considered to be unnatural." Cool.
My issue comes in the execution. Sheev is cunning in the prequels. He literally orchestrates the entire thing making the galaxy dance as puppets just for him. When we see him here, he is all "Revenge! Kill the last Jedi!" "No wait, she's my granddaughter! POSSESS the last Jedi and just destroy everybody else with my Force lightning! Mwahahaha!" It was just too much in the way of over-the-top mustache twirling that I felt just didn't work. You have this well-developed character who has been through the ringer and has waited patiently for decades in order to get his revenge. But maybe he just got inpatient and doesn't have time for games looking for his revenge.
That brings up a good question: What in the name of Sheev's melty face did the Sith want revenge for in the first place? Have we ever gotten an answer?
Agreed. I like Palpatine earlier in the movie, but the rapid pace later means he seems to be shuffling through ideas at the confrontation with Rey. Another area where it could have been smoothed over IMO. Maybe the rebels should build a giant surge protector against Force lightning?
