Marauder is a self-heal class; Warrior is the Tank Job of the Marauder Class; Warrior is the self-heal tank. Wrath stacks are the mechanic added to the self-heal class, but they don't change the fact that it is a self-heal class/job. In fact, it only reinforces it because Defiance increases HP (soak tank) and with full Wrath Stacks you gain bonus healing (self-heals also buffed). Warrior is a self-heal soak tank, as supported by its abilities and mechanics.
2.1 is adding in the DR and Damage Down and reeling in the self-heal on Storm's Path because the self-heal focus isn't working out, so they need to add mitigation. This is the change, not the standard.