I just realized that Warlock interacts weirdly with other classes, because if Pact Magic multiclassing, works like it does in the Alpha, a Multiclass Paladin of at least 2nd level and Warlock can cast Cure Wounds and 1st level Smites as encounter powers (short rest), and if they gain a Holy Avenger they can make it thier pact weapon now, and deal charisma necrotic damage with the right invocation with thier Holy Avenger, and they can share spells like the Alter Self invocation with thier mount (assuming both the invocation and the Find Steed spell works the same way which it may not).