On the whole, I'm feeling pretty good about
the addition of Fairies.
Partly because the series' metagame could probably use a massive shake-up like this, and mostly because it means two of my long-time favourites (Gardevoir and Jigglypuff) get recast as fucking dragon-slayers.
Dragon-slayers are cool.
ETA:
While we're on the subject:
-Sky battles!
-Five-on-one Horde battles!
-Different choices of battle music!
-Roller blades!
-Pokémon riding!
-Fucking Pistol Shrimp!
All of those things are also cool.