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I took a peak at stats, abilities, moves, but still need to play to form an opinion. Although I forsee diversity. I may compete this year for the first time since VGC'13.
I may try my hand at it as well. The new abilities look like they'll keep the meta game quite dynamic, though I do worry about some of the ultra beasts.
I've been playing vgc a lot and I'm starting to get it together, although I still need much practice. All ultra beasts are threats, they're very dangerous.