The data fields for tracking dying for PCs are there in PFRPG2, filling out the data is manual right now. But that doesn't restrict implementation of this extension in PFRPG2 because the data will be the same - whether it's manually entered or through future automation. And that’s just for PC death. 99% of the usual use for this extension is showing dead NPCs and that hasn’t changed from any edition - 0 HP = dead NPC.