In order to update his inventory to the next act, I had to tell him to switch to a different set. For example if he is selling hunter stuff tell him to sell one of the others. Just telling him to switch to hunter equipment again doesn't work, tried it.

With the addition of the new races he will give out potions of inflict wounds to Dhampirs as samples and remark on their curse of undeath with empathy

as an oread he offers a free scroll of stone to flesh

Halflings get a Scroll of Legendary Proportions. Just received mine.