I'm shocked that this isn't unwatchable trash, apparently. The trailers made it look awful, and that 1-minute clip from Prince Ali looked even worse.
But yeah, RT score doesn't mean all that much. A lot of the reviewers seem to say that the most positive thing you can say about this is that it isn't a tranwreck and it's watchable. That's not exactly high praise.
The thing I've always found misleading about RT (not that MC for movies is tons better) is that something that gets 100% 3/5 reviews will get a 100% RT score, whereas something that gets 70% 5/5 and 30% 1/5 (i.e., daring/divisive film, probably more interesting) will get 70%. RT is perfect for Disney which can crank out thoroughly adequate movies like nobody's business.