Good reviews take time.
For example, take TFA. Right now, most of us rate it highly, despite it’s flaws, because we know there are two more movies coming, which will finish the plot.
But, what if the next two movies end up just a static shot of Luke and Rey? Now, because the whole trilogy did nothing to move past it and there is no follow-up, TFA 4 years from now will be rated ~40-60%, when now its getting 80% all around.