Dude, if anything, that's a huge nerf to Wulfsbane. Armor break is better than cripple, yes, but dropping the chance from 50% to 20% is huge. I know on Cold Stones, even with a Hype Mode boosted Lupine Pummel, he sometimes still doesn't land the stun, so a drop from 50% to 20% is pretty huge. Its much easier to have a 50/50 chance at a huge damage boost to an already very damage stat than a 1/5 chance at the same boost. Plus, cripple can decrease the chances of Wulfsbane suffering a fatal hit