A warrior can not use warbringer to break out of snares if their target is in the dead zone. Any decent arena player should know that. Therefore a smart mage could easily beat a prot warrior.The problem with the PvP side of Warbringer is that when you consider prot warrior versus mage (just as an example), there was nothing a mage could do to a well versed warrior. The warrior carries a lot of stuns, silences, and then any attempt to root him is broken by multiple abilities.
Let's compare snare breaks to other tanks:
If a DK of any spec is stuck in a root, he can deathgrip, chains of ice. (25 sec CD with PVP spec)
If a Druid of any spec is stuck in a root, he can powershift out. (No CD)
If a Paladin of any spec is stuck in a root, he can use hand of freedom. (25 sec CD)
If a Warrior of ONLY the PROT SPEC is stuck in a root, they can use warbringer (Can use charge/intercept to escape (if target is 8-35 yards away) on average once every 15 seconds)
If warbringer is nerfed all warrior specs will be forced to sit in the snare and use spell reflect, or shield block (if still being attacked by ranged). Warriors will have NO offense when snared.
If nerfed. It would make more sense for the snare breaking aspect of warbringer to have a cooldown in itself, not remove the snare breaking completely.