Originally Posted by
Imnick
There is no such thing as a "Pure DPS Spec", when people talk about "Pure DPS Utility" they are referring to the spells accessible to classes that aren't capable of filling any role other than DPSing.
Besides that, an arms warrior can activate defensive stance, cast taunt, and tank, so even by your own arguments it can't be called a "pure DPS spec".
The words "pure" and "hybrid" are meaningless in terms of spec because specs are only designed to do one thing well. They only make sense when considering a class as a whole.
I don't think AM is coming back, it was an experiment to see if the community's weird concept of "utility balance" was necessary and has any effect on raid numbers and I think Blizzard have decided that it isn't and doesn't.