Diablo III: Reaper of Souls

[COLOR="#cc8899"]Nearly 70 on my Witch Doctor now, starting a Crusader for something completely different. Looking at some of the support skills Crusaders have and one in particular strikes me as absurdly powerful, so I'm suspicious that I'm missing something:

Judgement (Resolve) states that affected enemies have an 80% higher chance of being hit by a critical. I take this to mean 1.8x, not a flat 80% + whatever the attacker's crit rate is. Even so, given how much a 10% crit chance item can be desired, I have to wonder if there's something I'm missing that wouldn't make this the most amazing party skill ever (nevermind that the enemies would also be immobilized for up to 6 seconds).

Can anyone clarify?[/COLOR]

It's a flat +80%, so if you have 20% or more, while Judgement is active, you have 100% critical hit rate.