Im am sceptical about WARs being equivalent tanks to PLD.
If it were just a question of mitigating 20% of damage received versus healing yourself back 20% of the damage received, all would be well, however, to be able to gain HP back equivalent to the amount mitigated by PLD, the WAR would have to be dishing out incredible damage, which is not what we are seeing.
PALADIN:
Shield Oath: -20% DMG, all the time
Rampart: -20% DMG, 20s, 90s cooldown
Sentinel: -40% DMG, 10s, 180s cooldown
Bulwark: increases block rate by 60%, 10s, 180s cooldown
Hallowed Ground: Renders you immune to most attacks for 10s, 420s cooldown
WARRIOR:
Bloodbath: 25% of damage dealth to HP, 90s cooldown
Thrill of Battle: 20% heal and max hp increase for 10s, 120s cooldown
Inner Beast: 300 potency attack, absorb 300% of damage as HP
Storm's Path: 250 potency attack, absorb 50% of it as HP
So the PLD mostly has skills based off mitigating damage and the WAR, on absorbing HP from their attacks.
Considering amount of HPs are not that much of a consideration as long as tanks are decently geared, the +25% HP boost Defiance gives, feels lackluster, unless it is accompanied by a +20% bonus to healing received. If not, you might survive attacks, but healers, on the long run, will just run OOM trying to heal through the damage received unless you can heal yourself passively the 20% difference.
WAR does have a buff to heals received based on how much wrath they have accumulated, but considering they use up wrath for their attacks and heals, one can not consider that they would have the full 15% benefit for most of the fight. We might consider, on average that the warrior has around 3 points of Wrath on him throughout the fight, that's 9% to heals received.
So, a passive 20% damage reduction for PLD versus an average passive of +9% to heals received for WAR. there is a clear imbalance in the passives received. To fill that gap, warriors must use their cooldown abilities as well as spend their accumulated wrath. Consider that all this is to compensate for lack of Shield Oath, and is not taking into consideration that the PLD will ALSO be using his cooldowns.
So the question is: Can self-heals really compensate for the damage mitigation from all the paladin abilities?
Some things to consider:
1. Whereas PLD mitigates the damage directly, WARs need to try and heal the amount of extra damage received, which is based on their damage done. For example, for bloodbath to be equivalent to Rampart, the WAR would need to dish out damage equalling 4/5 of the damage the boss is doing to him, which is unrealistic by any stretch of the imagination.
2. A well-timed PLD cooldown can potentially block a large amount of damage from a big attack whereas a WARs self-heal will just heal him the same amount, which can only be boosted slightly via berserk/unchained, but never enough to equate the 20/40% reduction of a big attack.
3. Using inner beast, uses up our stacks of Wrath, and makes us lose our passive bonus to heals. it is practical and we use it, but its like taking a step back for every two steps forward.
The only way around this which does not include making Wars into PLD, would be to base our self heals on either damage received or, better yet, base the ammount healed on our max HP (plus a % of damage done). make those big HP pools mean something.