Here are the undocumented changes:
Death Knight
Blood
* Bloodworms: 3/3 Your weapon hits have a 12% chance to spawn 2-4 Bloodworms. Bloodworms attack your enemies, healing you as they do damage for 20 sec or until killed. (Healing amount remains the same)
* Sudden Doom now lasts 15 seconds (was 10 seconds).
Frost
* Chains of Ice cooldown has been removed.
* Icy Talons description changed: You leech heat from victims of your Frost Fever (old: your Icy Touch), so that when their melee speed is reduced, yours increases by 20% for the next 20 sec.
* Lichborne cooldown lowered from 5 minutes to 1 minute. Duration reduced from 30 seconds to 10 seconds.
* Aneurysm has been removed.
* Endless Winter has been reworked and moved to Aneurysm's position, it now requires Chillblains: Your Chains of Ice has a 50/100% chance to cause Frost Fever and the cost of your Mind Freeze is reduced to 20/0 runic power.
* Frigid Dreadplate changed: Enemies who hit you in melee have a 30/60/100% chance to become unsettled, decreasing their chance to hit for 5% for the next 12 sec. (old: decreasing their attack speed)
* Runic Power Mastery stats changed: Scaling runic power abilities behave as if you had an additional 20% runic power. (old: 2% runic power)
* Acclimation now affects the whole raid.
Unholy
* Anti-Magic Shell: Runic Power cost increased from 10 RP to 20 RP.
* Morbidity moved to Tier 1 in unholy
* Virulence moved to Tier 2 in unholy
* Blood-Caked Blade: Your autoattacks have a 5/10/15% chance to cause Blood-Caked Strike, which hits for 50% weapon damage times the number of your diseases on the target. (Was 60%)
* Night of the Dead: Hitting a target with Plague Strike or Scourge Strike reduces the cooldown of your next Raise Dead and your next Army of the Dead by 30 sec / 1 min. This effect stacks up to 5 times. (was bugged to be 1 min for both ranks)
* Desecration range component increased from 2 yards to 7 yards around the target.
Druid
Feral
* Savage Roar: Attack power increased from 25% to 35%.
Mage
Arcane
* Torment of the Weak description changed: All damage you cause to Ensared targets is increased by 2/4/6%. (old version: All damage done to slowed targets is increased by 2/4/6%.)
Frost
* Fingers of Frost description/duration changed: Gives your Frost damage spells a 5/10% chance to apply the Fingers of Frost effect, which treat your Frost spells cast on the target as if the target were Frozen. Lasts 4 sec. (old version: Gives your Frost damage spells a 5/10% chance to apply the Fingers of Frost effect, which treat your next 2 Frost spells cast on the target as if the target were Frozen. Lasts 10 sec.)
Paladin
Protection
* Divine Shield wording change: Protects the paladin from all damage and spells for 12 sec, but increases the time between his or her attacks (old: your attacks) by 100%. Once protected, the target cannot be made invulnerable by Divine Shield, Divine Protection or Hand of Protection again for 3 min.
Warlock
Affliction
* Improved Felhunter description changed: Your Felhunter gains mana equal to 100/200% (old: 50/100%) of the damage done by it's Shadow Bite ability, and increases the effect of your Felhunter's Fel Intelligence by 1/2%.
* Dark Pact: Drains 700 of your summoned demon's Mana, returning 200% (old: 100%) to you.
* Haunt description changed: You send a ghostly soul into the target, dealing 645 to 754 Shadow damage and increasing all damage done by your damage-over-time effects on the target by 20% (old: 0%) for 12 sec. When the Haunt spell ends or is dispelled, the soul returns to you, healing you for 20% of all damage done to the target.
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