A little late, considering 2.1 is just around the corner, but...
The Self Heal aspect of Warrior is so much fun to play, but it doesn't scale to damage the way that Paladin straight mitigation works. The Wrath Mechanic is cool, but relies on the use of Weapon Skills that don't scale to damage either.
The changes in 2.1 that pair Mitigation % skills to Warrior weapon skills and abilities really balance it well to Paladin as far as damage mitigation. So what if they could use % damage taken and apply it to the Wrath Mechanic to allow it to scale with damage, without giving Warrior actual Damage % Mitigation Skills.
If it was possible to track total damage taken, and using a tier system, apply that to the Wrath Mechanic it might look something like this.
1/10th of Max HP - Damage Taken = 1 Wrath
5 Wrath = Infuriate
Instead of having Mitigation Skills, you would just have them alter the ratio of Damage to Wrath.Example
6000 HP = 1 Wrath for every 600 total damage taken.
Wrath V = 3000 Total Damage taken.
Vengeance - Deals 50 Potency attack when damaged etc, - Gain 1 Wrath when 1/15th of Max HP worth of damage is received.
Because Warrior is a reactive tank, and is sensitive to Burst Damage, it might be most effective to have IB off GCD and with a 1 Second CD.
Other skill changes would include
Inner Beast - 150 Potency 600% Damage into Heals +Increased Enmity
Steel Cyclone - 50% Damage Dealt into Heals - +Increased Enmity
Issues with balancing would be damage over 1/2 of Warrior HP in a single hit, as you wouldn't benefit from damage not converted into Wrath Stacks. Also, a single attack that puts you at Wrath IV, then a large attack. Infuriate would partially assist with this but only every 60 seconds.
Sorry in advance if this copies a mechanic from another MMO. I don't play too many different ones.Foresight - Should be a 90s CD. Marauder should get a Trait for Foresight - Increase Parry Rate by 40%
Because MRD/WAR only has Parry and Paladin has Block/Parry, Marauder should also get a trait that when they parry, 50% of Parry Damage is recovered as HP.