Your statement, that tanks should be eating more damage because supposedly that enhances the skill requirement and interactivity of tanks over the present situation? My whole post is asking you why you think that's so. Current encounter design, for the most part, encourages tanks and healers to form their own specific strategies for balancing damage and survivability. I don't see how forcing the decision by drastically increasing damage dealt by bosses enhances interactivity and individual decision-making.