Coco basically dominated merge, especially after securing two idols.
That's not exactly a bad thing, but it does mean everypony else has played, at best, rather middle of the road. Granny at least realized that Coco needed to go, and probably would have pushed for Coco to be voted out if not for that last bit of immunity. And, well, Rarity got all the items, then let them rot.
Soarin did kind of take a few things personally, especially the in depth examination of Fluttershy being voted out. That probably hurt him at merge more than it should have, and made it really hard for him to join with Rainbow and Rarity.