I suspect this is being pushed as a way to break up the tank role and allow some specialization. However this doesn't feel like the right way to do it. For one the setup seems wrong- the two jobs we have with retaliation effects for getting smacked (Dark Knight TBN Dark Arts, and Warrior Vengence) are both stuffed in the off tank slot. Sure, this is basically a rebranded job rework so maybe they don't keep those, and at least TBN can be put on allies, but it still seems a silly way to go.