Priests get Holy Binding, Warlocks' Wrack hits harder

• Priest: Shadow Word: Death now costs the Priest 30% of maximum health when it fails to kill (was 10%), but no longer hurts the Priest when it misses. Holy’s Binding Heal is removed, and Holy Binding takes its place: when the Priest’s Flash Heal heals someone else, half that healing also goes to the Priest, without threat. Vampiric Embrace’s healing can no longer crit, Devouring Contagion no longer spreads Devouring Plague from a critter, Power Word: Shield can be replaced by one of equal or higher rank, and curing diseases no longer drops Shadowform.
• Warlock: Affliction’s Wrack has its spell damage coefficient doubled, and its base damage per second at level 60 rises from 36 to 86. Improved Drains now drains more mana but no longer boosts Wrack. Drain Soul is much less likely to give a Soul Shard without a kill. Pets get 2 health per point of the Warlock’s Stamina (was 7.5). Destruction’s Shadow and Flame gives 4 to 20% more Fire or Shadow damage (was 2 to 10%). Spellstones now boost only Shadow damage, and Amplify Curse now affects Curse of Exhaustion and Bane of Agony.

Why it matters: Shadow Word: Death becomes a riskier finisher, and Warlock pets have much less health than earlier in the beta.