How is it effected by stonewall too? Completely stopped?
The crowd control effect itself is reasonable for team pvp (i.e. 1 melee can only "fight" one guy at a time etc), but it is broken in 1v1 combat, and with my other suggestion about ghost, lone players scavenging and the like would be the ones that suffer the most (and likely would be the first to say it was broken and OP).
Extra crit roll for less damage is good, or extra crit chance would be good too, or maybe something like it makes you slower (+1 AP cost to melee attacks), for increased crit effects.
There's the other trait too, which from memory works similarly.