The vast majority of Star Wars movies are, to some extent, terrible, so personally I’m not too phased by these negative critic reviews. Even if the movie is abysmal when I go see it this evening, I’m sure I’ll be able to at least enjoy it in the same way I enjoy the Phantom Menace. Maybe I’m a mindless consumer.
And then a few years from now, our community here will have produced hundreds of fanedits, and maybe managed to turn it into a good movie. It sounds like it suffers from the opposite problem as TLJ though: that movie is too long and has some jarring jokes and moments - problems easily fixed with fanediting - while it sounds like this movie tries to cram too much in to its runtime. We can VFX in extra ghosts, replace audio, adjust Ben’s fate etc etc. but it’s not really going to be possible to change Palpatine’s death sequence or anything that fundamental. Fingers crossed for some high utility deleted scenes.