Forever changes
Curse of Agony/Doom become Bane of Agony/Doom (not curses; stack with Curse of Elements/Recklessness); DoTs can crit; Spellstone/Firestone become weapon oils; demons get Move To and scale with gear; Drain Hope, Pandemic, Soul Siphon (Aff); Demonic Sacrifice rework + Demonic Pact capstone (Demo); Incinerate capstone, Bane of Havoc, Shadow and Flame (Destro); Chaos Bolt not present. Troll Warlock new.
Confidence note
Reported (single credible outlet, BlizzCon demo build; subject to beta change)