Originally Posted by Blizzard Entertainment
Artifacts
The Deadwind Harvester - Purged the life from Deadwind Pass, for Affliction Warlocks. Get together with Council of Black Harvest, steal some information about artifacts from the Legion. Go to Deadwind Pass, under Karazhan! Every time you kill something, you get a damage boost for a short time. Souls try to escape and you can reap the damage boost effect.
Classes
Demonology should be about summoning demons, not becoming one. More new minions, buff them and send them out to attack. Metamorphosis is for Demon Hunters.
Warlocks
Demonology has gone really far off track from where the core fantasy is.
The team looked at Demonology and took some inspiration from what exists today, but mostly started from scratch.
Demonology is going to be completely different, which is going to require a lot of iteration and feedback from players.
There is no way to enslave dreadlords permanently, but they have talked about a talent that lets your enslaved demon last longer or making it permanent, but there are significant balance concerns.
It is much more focused on summoning demons and empowering them.
You still use Shadow Bolt as a generator.
Hand of Gul'dan is a spender which drops the meteor, but also summons one imp for every Soul Shard you spend on it, up to five.
There is a rotational ability that summons a pair of new demons, Dreadstalkers.
There is a new rotational Demonic Empowerment, that will buff the demons you have out, giving them a Bloodlust like buff.
Lots of talents that summon demons as well, one makes Curse of Doom summon an imp when it pops.
Another talent makes the Dreadstalkers you summon come with imps riding on them.
No female Felguard in this expansion. Creating and animating new models is very expensive.