In the latest build of the beta the hunter spell volley was taken out of the game. There are a couple blue posts to back it up as well.
Channeling a spell that makes arrows fall out of the sky doesn’t feel like a hunter ability and doesn’t even really match the name of the spell.
Blizzard powerauras were on display and if have no idea what power auras are I will explain. A power aura is a indicator in the form of an image to help you know when something procs. There are so many other ways it can be used but that is just one example. ( The video is not the best example , but it is the only video available at the moment. )