I don't dislike the new animation for Wings but I do wish they added a glyph for people who prefer the original animation. There's really no reason they couldn't do that.
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I'm not sure what the exact proc rate is but it's at least as often as Divine Purpose. It can also proc off of any attack which is cool. I'm really glad they listened to those of us that asked for that proc back (just wish it was baseline like it should have been since WoD).