First, of all. I did not hate or love this final movie. I have major problems with this movie, but I also praise certain aspects.
Here is my biggest issue with the Emperor coming back. It totally ruins the redemption of Anikan. Anikan brings balance to the force by killing the Emperor and thus redeeming him. This new ending totally negates the whole point of the original ending. Its obvious that Disney had no road map on how to franchise was to continue, and thus had to bring back the Emperor after Rian Johnson killed off Snoke in TLJ.
Secondly, you are telling me the entire Rebellion army could navigate its way through the asteroids and debris to make it to Exogol with the huge ships. No way, most of them are not expert pilots.
Also, what is with all the fake out deaths. We have way too many Chewie (what was with the out of nowhere second ship?), Kylo Ren/Ben, and C3PO losing his memory. I just feel they couldn't commit to anything, because it would make the fanbase upset.
Now that I spilled so much bad I will talk about this good. I really enjoyed the fight between Rey and Kylo on the Death Star. It showed Rey's anger, and Kylo just trying to stop/defend her. You can see he is just trying to parry and deflect all of her attacks. Next, the opening scene was very interesting with Kylo cutting down the Sith Cultists. Although brief it shows Kylo's resolve to get to his new master. The force connection between the two was used pretty well with the transfer of the lightsaber.
Time will tell how I will rank it in my personal list, but it was a decent film that played it too safe. Out of the endings for each trilogy (Revenge of the Sith, Return of the Jedi, Rise of the Skywalker) it is probably the weakest thematically.