The latest patch for World of Warcraft: Mists of Pandaria will fine-tune balance and tweak specific abilities across all classes, according to a series of posts on Battle.net explaining the changes.
Unholy Death Knights have had their "quality of life" improved through several spell adjustments that make the battlefield easier to maneuver. Two player-versus-player abilities, Strangulate and Asphyxiate, now have reduced cooldown periods and a handful of other Blood-based attacks have been buffed.
Druids have received healing buffs across the board, and the Wild Mushroom item has been redesigned to collect Druids' healing spells and unleash them all at once upon "blooming." Hunters' Marksmanship abilities now do increased damage and have a small boost applied to certain self-healing abilities.
Mage abilities across all class trees have been balanced for equal power, and a new Flameglow talent has been added, a passive defense ability that absorbs damage. Frost Mages have received power boosts for greater effect in PvE, and Blizzard will continue to deal with "overpowering" issues in the class's PvP abilities after patch 5.2. Paladins' Holy ability was too powerful in PvP, so that ability has also been lessened, while the Retribution ability has been given extra power buffs. Priests' Discipline and Shadow abilities have also been tweaked to perform roughly the same in both PvP and PvE.
Rogues and Shamans have had their abilities balanced to be more effective in PvP, and several PvE abilities including the Rogue's Smoke Bomb ability now provide damage reduction. Emphasis on pets has also been returned to the Warlock class.
The Warrior's Taste for Blood ability now has less potency, countering an "overpowering" problem, and Monks who go down the Mistweaver path will become "melee healers," with the ability to attack and heal allies simultaneously.
A full rundown of changes made to each specific class can be found on Battle.net.