Does that include the power animations, Arcana?
It does not, except where a power animation happened to be reused as an emote (for example, "tarzan").
Basically, if you could /e Something, that something is in there. Also if the devs could /e Something but it required dev access to do it, its in there. So it does include some emotes that were only used in content that no player could normally invoke (i.e. RomulusTransformation), but devs could if they were logged into characters with admin rights.
I'm thinking of making one for power animations, but at the moment with the current limitations of Icon you'd only see the animation, not the effects related to it in most cases. Also, I don't think there's a way for Icon 1.7 to properly draw most weapons for most player powers yet. I've honestly only just recently started poking around with Icon beyond just flying around with it.