Probably because Ice has a lot of weaknesses, so it's fairly easy to cover. The initial leaks said Fairy will be immune to Dragon attacks while being super effective against Dragons, though the former point hasn't been confirmed yet. Regardless, it's enough to make some people freak out. They're apparently forgetting Dragons can learn plenty of other types of attacks and Fairies won't be omnipotent by any means. Dragons will still be able to put up a fight.
One other point; Dragon and Ice were introduced in the same generation. Fairy is being thrown into the mix after people had become comfortable with Dragons in the most prominent position, and now they're afraid Dragons will be dethroned because of Fairy's sudden appearance and advantage against them. There wasn't much of a reaction from Dark being introduced to nerf Psychic and Steel to... be the definitive defensive typing(?) because people were upset by Psychic's lack of weaknesses and didn't take the time to adjust to it being in power.
Dark was made to nerf Psychic, but no one bats an eye. But Fairy was made to nerf Dragon, and everyone loses their minds.
You sure about the first part? :p
As for the second one, i repeat: Dragon immunity renders Outrage useless, and a typical Dragon's perfect coverage will be but a thing of the past - do you pack moves against Fairies or Steels? Don't forget Sylveon's bulky as f***.
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Because if the leak is true about Fairy being immune to Dragon, then Outrage, Choice Specs Draco Meteor, et cetera--staples of the Ubers tier and relatively common in OU--can be stopped by switching in an Igglybuff.
Generation (pi)(i). When you see this, raise e to the generation and add 1. Social experiment.