Basically bladestorm damage sucks in pvp plain and simple. If you argue this i'll laugh at you. Im using it right now as a get-out-of-roots or avoid cc's by precasting button, and so its usually cancelled right away. I'd honestly be waaay happier with a 6 second immune to cc cd.
Any other warriors a little unhappy with bladestorm atm? I almost consider not speccing into it but its still damn useful to avoid roots.