Dolls drop for me in Hell from act bosses AND sometimes from bosses in Baal throne room from waves. But it is a chance to drop, so it might take few tries. I got them no problem in 3.0 just two days ago. Try p8 if you play in SP.
Kabraxis always dropped set items for me. Not sure if he is suppose to drop something new in 3.0 version.
UPDATE !!!
Abyss uber in act 1 Hell - outer cloister area left corner of tamoe highland - many levels down. Found two unique mobs. King Leoric dropped 1 unique, 1 set item. Last level has Diablo boss - drops charm ! Charm also works as endless source of town portals
Update 2.0
Did same uber for second time - Diablo boss did not dropped charm. So it's probably a chance to drop.
NIthlakh p8: