I don't think you can get many of the tanks in the community to participate in something like this because there are many tanks hate the idea of having their DPS decreased. I think for some, the interesting part of tanking is getting maximum DPS output while surviving the fight. Anything done that decreases that amount will be a turn off for them. If SE is going this way, they likely will alienate a lot of tank players. Thought I suppose locking tanks into a specific play style will do that.