I have a tank (druid) and recently leveled my Holy Pally to 90. As a healer, I am bothered by the lack of active mitigation being used by tanks. Personally, I liked it a lot better when tanks could gear for avoidance/mitigation. I recently looked at a log for MSV Stone Guards. The warrior tank used Shield Block 11 times, Shield Barrier -0- times, and Heroic Strike 62 times. (They also never used Thunder Clap for the Weakened Blows debuff, nor Demo Shout.)They downed the boss, but I was amazed at the extra burden that puts on the healers. Since about 70% of the damage in that encounter is a bleed (magic damage), they should be using all their rage on Shield Barrier.
I've looked at a number of logs and continue to see very little use of active mitigation, or the wrong one being used. Now to be honest, I didn't like the idea of all tanks going to the active mitigation model in the first place. Before AM, a good DK tank was awesome - but that was only about 5% of them. Why open that door to being bad for all tanks? I used to be able to inspect a tank and when I saw all dps/pvp gear, I knew he wasn't a "tank". Now, there's no way of telling except when you go oom trying to heal them and they still blame the healer.
What I also find amusing is that a lot of healers that are way over-geared for 5-mans now find healing such tanks "challenging" and they enjoy it. Do they not realize they are perpetuating a bad trend? And the next healer who only has blues may likely fail and you know what the tank is going to say? He'll say, "The last healer didn't have a problem. You suck!"
Just wondering what other tanks/healers think about Active Mitigation model for tanking? What are your experiences?