I suppose we'll find out in just under 3 weeks (fingers crossed), but it occurs to me that we've only seen Astorion making feeding choices when he was the character played by Swen. We've also been told how it will work in multiplayer. If you're playing a different character and Astorion is in your group, how do you suppose they'll decide whether (and on whom) he feeds? Will they even tell you (it's not like they tell you which of your party members takes the devil's offer)? If not, I predict a bunch of bug reports or complaints about not healing properly after a long rest...