In my opinion, in regards to including Ravnos in Chronicles set after the Week of Nightmares, I'd say that there is great opportunity there for both PC and Storyteller Ravnos.

Think about it I see the potential for individuals, depending on whether or not they follow Humanity, who seem haunted, broken and possibly afflicted with all manner of guilt. Maybe they diablerised someone they loved...maybe they are the only survivor of their coterie after the others devoured one another.