Affliction

Improved Felhunter: This talent now also reduces the cooldown on the felhunter’s Shadow Bite ability by 2/4 seconds.

Demonology

Decimation: Redesigned. When Shadowbolt, Incinerate or Soul Fire hit a target that is at or below 35% health, the cast time of Soul Fire is reduced by 30/60% for 8 seconds. Soul Fires cast under the effect of Decimation cost no shards.
Demonic Pact: This talent now also increases the warlock's spell damage by 1/2/3/4/5%.

Destruction

Conflagrate: Redesigned. This talent now consumes an Immolate or Shadowflame effect on the enemy target to instantly deal damage equal to 9 seconds of Immolate or 8 seconds of Shadowflame, and causes additional damage over 3 seconds equal to 3 seconds of Immolate or 2 seconds of Shadowflame.

Pets

Avoidance (passive): Now reduces the damage your pets take from area-of-effect damage by 90%, but no longer applies to area-of-effect damage caused by other players.
Doomguard/Infernal: These pets now innately have Avoidance like all other warlock pets.
Shadow Bite: This pet ability now provides 15% increased damage for each of the warlock’s damage-over-time effects on the target.
Summon Imp: This ability is now available from the trainer for level 1 warlocks and no longer requires a quest to learn.