I have to agree with much of what is said here. I can get behind Moana as part of an Oceania land, bringing in Finding Nemo, so long as there are sufficient animal exhibits. Even an aquarium would be nice to explore a new part of animal life in the park. I also hope that Zootopia never comes to pass and we get to keep a small Dinosaur section that remains with Dinosaur/CTX, the Boneyard, and Restaurantasaurus.
What will continue to baffle me is Disney ignoring the real need in service of an imagined one. The need for the parks is capacity, which Disney continues to ignore in favor of a perceived bump from IP. This is most evident in the Moana/Zootopia announcement and in the San Fransokyo announcement for DCA.
Here, DAK needed new attraction capacity. Particularly to balance Genie+. This could have been easily achievable by adding a replacement or few for Primeval Whirl. Imagine if they had added a new roller coaster toward the back of the Primeval Whirl plot, and then reconfigured the Dinoland space for a dinosaur carousel and tea cups or bumper cars. That would have at least added some capacity. And could have been achieved for a fraction of the cost they are about to expend.
As it is, they are adding no attraction capacity and throwing I'm sure what will be a lot of money at a questionable re-theme that gains them little and locks them into a very specific theme for expansion. How much Moana merchandise can this move? How much moves now and how much could this increase it?