I beg to differ - sure, the Princess Fairytale Hall may not be your cup of tea, but by no means is a young adult male the target audience. It's a great addition that helps concentrate some high-demand characters in a single spot.
And regarding Maelstrom, in my opinion, that attraction is outdated and a Frozen overhaul is the fresh new life that it - and World Showcase in general - desperately needs. Sure, the back half of Epcot is beautiful and highly detailed, but it's extremely lacking, especially for children. Including Disney characters into the attractions is a genius idea, and I hope it's only due time until we see Ratatouille in France, Alice in Wonderland in United Kingdom, etc.
My main issue is outright replacing things rather than updating and adding things. When's the last time that World Showcase got a new attraction? Plus, Maelstrom is still popular... wasn't it originally on the higher tier for FP+? Just wait until Frozen is passé and Disney doesn't update the attraction... like happened with Dinosaur, It's Tough To Be A Bug, HISTA, that Narnia thing in DHS, etc. For the record, I thought that having the Frozen meet and greet in Norway was a good idea and it's stupid that they moved it back to MK. Seems more like someone trying to justify the Fantasyland redo... anyway, it would have been nice if they updated Snow White (like Alice in Wonderland at DL) and put the meet and greet area somewhere else. I do appreciate that they didn't try to shoehorn it into Tomorrowland or Frontierland or something, but it's a shame to lose another classic ride for more characters. At least they didn't come at the cost of an awesome castle walkthrough like Tokyo Disneyland.