Just saw it. It's definitely not the best SW movie, and there's lots of things to critique, but all in all, I enjoyed it and thought most storylines were closed with some semblance of coherence.
I'd definitely rank it above 1, 2 and probably 8. Some bits were obviously rewritten around Fisher's death, and some of the fan service was unnecessary and some characters...ugh. but overall, not the train wreck I was expecting given some of the comments and reviews I'd seen.
It's more interesting for the antagonist to be someone the protagonists have interacted with on multiple occasions and have shared relationships toward than Ominous Space Evil, whether that be Palpatine or Sith Cthulhu. This is basic storytelling.
More complex and character-driven though;
Having a haunted outburst-prone antagonist try to command a military/government which is completely out of his character's grasp is more interesting than Perfect Evil Guy antagonist.