Warlock

Curse of Exhaustion now reduces movement speed by 30%, down from 50%. Its range has been increased to 40 yards, up from 30.
Demon Armor and Fel Armor no longer cost mana and last until canceled.
Devour (Felhunter) cooldown has been increased to 20 seconds, up from 8. Devour is no longer able to be auto-cast.
Drain Mana has been removed from the game.
Fear now has a PvP duration of 8 seconds.
Fel Armor has been redesigned. It now surrounds the caster with fel energy, increasing spell power and causing the warlock to be healed for 3% of any single-target spell damage he or she deals.
Seduction (Succubus) now has a PvP duration of 8 seconds.

Talent Specializations

Affliction

Soul Swap can no longer be dispelled (the aura given to the warlock between swapping).
Unstable Affliction’s silence effect has been reduced to 4 seconds, down from 5.

Demonology

Demonic Aegis now increases the healing effect of Fel Armor by 50/100%.
Demonic Rebirth now highlights summoning spells when active.
Demon Soul: Imp redesigned. It now increases the critical strike chance of all non instant cast Destruction spells by 30%, rather than increasing critical strike damage. Duration reduced to 20 seconds.
Felstorm (Felguard) damage has been reduced by 20%.
Immolation Aura damage has been reduced by roughly 30%.
Inferno no longer increases the radius of Hellfire, but instead increases the duration of Immolate by 6 seconds in addition to its existing effect.
Master Demonologist (Mastery) benefit from mastery increased by approximately 33%.

Destruction

Burning Embers damage has been reduced by 15%.
Fiery Apocalypse (Mastery) benefit from mastery increased by approximately 8%.
Improved Soul Fire now increases Fire and Shadow damage done by 4/8%, rather than 7/15% spell haste. In addition, this talent has been moved to tier-3 Destruction, switching places with Aftermath.
Shadow and Flame can now proc from Incinerate in addition to Shadow Bolt.

Warlock Bug Fixes

Rank 2 of Backdraft should no longer have charges consumed when casting Immolate.
The spell animation for Demon Circle: Summon no longer persists through death.
Demon Leap should no longer cause players to pass through the environment at the entrance/exit of Orgrimmar.
Drain Life cast when under the effects of Soulburn no longer has higher damage than the normal version of Drain Life.
Empowered Imp can no longer proc if the warlock does not have the talent.
Hellfire will not proc the Muradin’s Spyglass buff without hitting an enemy target.
Warlocks with the Jinx talent who have an active Curse of the Elements on a target should no longer be interrupted while eating or drinking.
Nether Protection should now proc properly from all associated abilities.
Rain of Fire now remains at the same location it was cast at while on a moving transport.
Ritual of Summoning should no longer yield graphical issues with the created portal.
Casting Soulburn during the global cooldown of a Soulburn ability, and while under the effects of another self-buff, was sometimes causing Soulburn abilities to be non-functional. This has been corrected.
The UI fly-out for a warlocks’ summoning spells now updates in real time based on the warlock’s available mana.
The tooltip for the armor value in the Character pane should now be showing the correct amount of armor granted to pets.

Glyph Fixes

Glyph of Voidwalker’s tooltip has been updated to the new pet scaling system.