Literally all of the things you mention are not what kids want. They are what you and probably several other grown-ups want. You have to realize that a Frozen ride is going to happy young adults and their future children for at least the next decade. Also kids don't want "Educational". They want Nemo. Disney is just smart enough to combine the two. Parks need to progress.
I don't think an end-of-the-year party and a ride at Disney World are comparable.
Disney is just 'business savvy' enough to take a popular IP and phone it in.
But I question you saying what I want isn't kid-friendly.
Inside Out (a Pixar animated film) as a WoL replacement wouldn't appeal to kids?
A gorgeous, state-of-the-art Hunny Hunt/Mystic Manor-esque dark ride themed to Figment and the Dreamfinder wouldn't appeal to kids? With colorful sets/AAs?
A Mary Poppins attraction in the UK wouldn't appeal to kids?
IASW replacing the Odyssey wouldn't appeal to kids?
A Ratatouille clone in France wouldn't appeal to kids?
A Matterhorn clone in a Switzerland pavillion wouldn't appeal to kids?
A dark ride with Mushu guiding guests through China wouldn't appeal to kids?
An updated Energy pavillion wouldn't appeal to kids?
An EMV dark ride that takes you through tornadoes, hurricanes, earthquakes and snowstorms wouldn't appeal to older kids? (8-12 yr olds)
Just because kids 'want' Frozen or Nemo doesn't mean the attractions have to dumb down their respective areas. It doesn't mean they should be shoehorned in because TDO doesn't actually want to expand the parks. Kids are a lot smarter than you think - Walt and the classic Imagineers knew that (POTC, HM, Jungle Cruise, Adventures Through Inner Space, Spaceship Earth, Horizons, Worlds of Motion, original Journey Into Imagination, Living With the Land, Great Movie Ride).
If your logic had been applied, they would have simply taken a Disney cartoon/film and done a simplistic 'book report' version. But they didn't. They knew kids and adults alike could appreciate a more sophisticated ride experience. They knew people didn't need a blatant tie-in to enjoy an attraction if it was high-quality.
The expansion pad between Mexico and Norway definitely could have been worked out to fit a high capacity dark ride and the M&G without replacing Maelstrom. TDO just wanted to keep costs low.
Epcot being turned into 'whatever we don't have room for in Fantasyland under the loose guise of education/progress' isn't progress. Just adding an animated film to an existing attraction alone isn't enough to fix anything. If anything, it just makes the left side of World Showcase a capacity nightmare.
Maelstorm was never a good ride. It never had a cohesive storyline, and it was in desperate need of an update.
I believe the Frozen craze has died down a bit, but this ride will be a huge hit anyway you slice it.
Frozen Ever After's storyline is equally incohesive based on insiders' reactions. It's supposedly 'Let it Go', Olaf/Sven doing something funny, and Anna, Kristoff, Elsa and Olaf saying good-bye.
Maelstrom should have gotten an update, instead of a dumbed-down Snowflake replacement. Plenty of room next door to Norway for a Frozen dark ride. Not to mention DHS or the Speedway at MK.