Perhaps its because I never went to WDW as a child (we couldn't afford it), but I don't mind Frozen in Norway, Ratatouille in France, or Donald Duck in Mexico. I wouldn't really mind Jasmine and Aladdin in Morocco.
(Yes, I realize this is an unpopular opinion.)
I think incorporating its IP into the various showcases is an excellent way to make the showcases more palatable to those who aren't really interested in other cultures (ie children). It would certainly give me a bit of respite from the "how long to we have to stay here?" while I'm looking at the Stave Church.
Also, the characters that are created with aspects of these various cultures can be an excellent bridge to a child's interest in the culture. That interest can evolve over time to a more genuine interest. Where a child might not give a second look in the direction of the Norway Pavilion, the Frozen features gets them there (willingly).
I've noticed a change in my oldest over the course of our three WDW trips. On the first trip, she was 5. It was princesses, princesses, princesses. A few of the tamer rides. She was beyond bored when we took a few minutes to look at the various cultural aspects of the World Showcase. On our most recent trip (age 9 at the time), she still wanted to see princesses and ride rides, but she also commented on the differences of the countries, as well as what she liked and disliked about each showcase.