I thought the film was a bit of a mess. The plot was all over the place and it all seemed a bit tacked on, the Emperor being back made little sense and they didn't bother to explain it much. That said it was hard to see where they could go.

Retconing Rey to one against be related to someone also seemed to mess with one of the best part of Last Jedi, that she wasn't 'someone' and had to find her own place in this story. Nope, Palpatine's Granddaughter. I knew they would do something like that because of the anger from fans that she wasn't part of a family line.