How many windfury minions have seen serious play in hearthstone? Raging Worgen in a very specific charge combo deck that only briefly existed, and once upon a time, Al'akir. In both cases, the only reason they saw any play at all is because of charge.
I'm not seeing how a very expensive vanilla windfury creature could ever see play.
On one hand, they make cards like this that justifies its cost with its windfury effect, but on the other, they introduce many better minions that can give other minions adaptative perks such as windfury ... I don't think we'll see this Stormwatcher often, outside of Arena.