Lessee...

Paladin: Largest problems are TP and the fact that new combos were added but Halone's enmity potency was unchanged.
+ Increase Savage Blade enmity multiplier to 3.5x.
+ Increase Rage of Halone enmity multiplier to 5.5x.
+ When cast in Sword Oath, Clemency restores 100 TP. The 50% healback would still apply.
+ (Iffy change) Royal Authority gains a new Combo Bonus: Procs Shield Swipe.

Dark Knight: Largest problems are TP and an unusual inability to make Parry extremely likely considering they use it for a proc.
+ When in Blood Weapon, every weaponskill restores 10 TP.
+ When in Blood Price, getting hurt restores 10 TP.
+ Applying Dark Arts to Dark Dance increases Parry Rate Increase to 50% instead of increasing Evasion.
+ (Iffy Change) Applying Dark Arts to Souleater additionally absorbs 20 TP.

Warrior: Largest problems are TP, Mitigation, and invalidation of other possible Off Tanks
+ Any party which does not contain a Warrior gains a Bravery Buff which increases all stats by 5%
- Fell Cleave only deals damage if it crits
+ Defiance temporarily turns the Warrior into a Dark Knight. It can only be removed if a Paladin or Healer chastises the Warrior and punishes them with a Time Out.
+ Equilibrium no longer restores TP in Deliverance. It instead causes the Warrior to balance on one foot for a while. Attacks performed during this time deal 1% more damage. This bonus is increased to 100% when on a narrow platform.
+ Inner Beast no longer decreases damage taken. It instead causes the Warrior to begin transforming into a beast. Each use of the skill increases attack power by 5% but hastens the transformation. If the transformation is completed, the Warrior will turn on the party and begin one-shotting party members. The transformation can be reversed before completion by using Equilibrium while in Defiance.

All
+ Attack Power scales off of Vitality at a ratio of 1 VIT = 0.80 Attack Power, rounded down.
- All attacks lose enmity multipliers when used outside of a Tank Stance(this would not apply to Paladin until Level 40).

The Tank Forums
The following topics are each to be merged into their own single thread:
* Paladins are underpowered
* Warriors are overpowered
* Suggestions to change Dark Knight
* The Tank's role in the Holy Trinity
* Strength vs. Vitality

P.S. The Warrior stuff is a joke. I promise.