PLD gets hallowed ground for a bit

WAR gets a pull/bind/cant-die-passed-0 ability

GNB gets a mini HoT

DRK gets a relatively easy to burst shield that requires mana

If tanks are supposed to be tanks, why do GNB and DRK have such little to survive/sustain with? you can argue DRK's silence ad GNB's damage balance that but if they're tanks then shouldn't they get that nerfed a lil and be more about absorbing hits to lead the party?