Tanks
At the current state, all tanks feel the exact same when it comes to mitigation. Every tank has a 10% (15% for PLD Sheltron), Rampart (20%), a 30%, Invulnerability with a different effect, and a couple unique skills. The following proposals would add Identity by changing how the tanks would interact with targets.
Paladin - men and women marry exquisite swordplay with stalwart shieldwork to create a style of combat uncompromising in its defense. Clad in brilliant silver armor, they charge fearlessly into battle, ever ready to lay down their lives for their liege. To be a paladin is to protect, and those who choose to walk this path will become the iron foundation upon which the party's defense is built.
PLD in its current state is accessible, easy to learn with minimal optimizations.
Should receive a small percentage bonus based off current armor to reinforce the identity of being uncompromising in defense.
Add a 20 min cooldown at 5000 MP for raise. Upon use the player would receive the weakened debuff. The paladin lays down their life to raise a party member in an emergency. This would make PLD, the safe choice with the ability to see more of an encounter.
Warrior - On the northernmost edge of Abalathia's Spine exists a mountain tribe renowned for producing fearsome mercenaries. Wielding greataxes and known as warriors, these men and women learn to harness their inner-beasts and translate that power to unbridled savagery on the battlefield. In former times which saw war waged ceaselessly in Eorzea, the warriors featured prominently on the front lines of battle. With the arrival of peacetime, however, their art has descended into the shadows of obscurity, where it remains to this day.
Should receive a straight 5% damage reduction. This would allow newer players unfamiliar with cooldown usage to be more easily healed.
With the added damage reduction bonus, mitigations would be reworked to be generated based off of rotation. By utilizing the inner beast the player would generate defensive capabilities from attacking the target.
By tying defensive capabilities to rotation this would add complexity to warrior by adding a form of resource manage with defensive cooldowns.
Reduce the effectiveness of Nascent Flash
Warriors self-healing capabilities are over tuned and reduce the effectiveness of the healer role.