Something like this gets people extremely mad for some reason, I think they assume it would essentially become too "easy mode" if a spec could ignore a mechanic but I disagree. Honestly I think if they made the duration on the defenses short enough it essentially becomes a skill check. Do you know when the mechanic is going to come out? Better hit the button at the right time or else bad times. Instead of ALWAYS having to move out of the shit you can test the Shaman another way, obviously they should still have to occasionally move but I mean Mage gets Ice Block and they are supposed to be the MOBILE caster...