I love the Mickey Mouse Review, but there is no denying that it's dated and most people in the park can't be bothered to sit through it even when the lines for every other ride are hours long. This is an attraction that no one but us cares about.
Of course it will be replaced by Mickey's Philharmagic--that show is one of Imagineering's greatest success in decades. Everyone loves it. They come out smiling and wanting to see it again. And by drawing in lots of people, it helps to alleviate overcrowding in other areas.
Maybe they can ship the Mickey Mouse Review to Hong Kong Disneyland?
They could really do a lot for Hong Kong in short order by adding Mickey Moust Review, Alien Encounter, The Timekeeper, and so on.