Dec 4th 2009 6:48PM WSG/AB.
Dec 4th 2009 12:49PM People always have and always will look to tank health as the primo stat for judging a tank. Until we can target you and have it show us your avoidance, adding that extra step or 3 to find it out inhibits the number of people who will use it.
Besides, since so many tanks just gear/gem/enchant exactly like they're told to from guildies or the internets, their health all gives a pretty accurate picture of where their avoidance is relative to the other tanks. I have seen very very few tanks that are noticably different ever since the proliferation of EJ and Tankspot and other, similar sites.