13.01.15 (у нас - 14 или 15 числа, учитывая время новости)

Class

Death Knight
Unholy
Festering Strike's damage has been increased by 28%.
Scourge Strike's damage has been increased by 28%.

Druid
Balance
Starfall's effect is now only suppressed when shapeshifting into a non-Moonkin form. Shifting back into the appropriate form will allow the effect to resume.

Monk
Armor Sets
Tier-17 4-piece set bonus for Brewmaster Monks now only triggers when you Purify Moderate or Heavy Stagger.
PvP 2-piece set bonus for Brewmaster and Windwalker Monks now only triggers while in PvP combat.
PvP 4-piece set bonus for Brewmaster Monks now confers 75% of the Guard effect to the 2 nearest allies.

Rogue
Combat
Blade Flurry is now able to trigger from Multistrikes.

Raids, Dungeons, and Scenarios

Highmaul
Kargath Bladefist: Resolved an issue where players can incorrectly get locked to the instance after wiping to Kargath on Mythic difficulty.
Imperator Mar'gok: Gorian Warmage's Fixate ability should now only cause the targeted player to drop out of stealth instead of incorrectly causing all steathed players in the raid to drop out of stealth.

Legacy

Blackrock Caverns
Rom'ogg Bonecrusher's Skullcracker ability should now correctly deal damage to Angered Earth elementals, allowing the achievement Crushing Bones and Cracking Skulls to be completed.

PvP

Alliance and Horde Conquest vendors should now offer non-set cloth gloves and non-set plate chest pieces for sale.
Ashran
Amphitheater of Annihilation: Mandragoraster's Fertile Spit ability now caps out at 6 nearby targets.
Battlegrounds and Arenas

Arathi Basin: Players should now always have a fixed 25-second resurrection timer while in a Rated Battleground match.
Deepwind Gorge: Using Ice Floes or Aspect of the Fox should no longer incorrectly allow players to capture a point while moving.
Items

The following items can now stack up to 20.

Crate of Salvage
Big Crate of Salvage
Excess Potion of Accelerated Learning
Follower Re-training Certificate
Hearthstone Strategy guide
Supreme Manual of Dance