That reminds me a bit of Kingdoms of Amalur: Reckoning, which is a rather nice little game that I really enjoyed. Not everyone's cup of tea, though. Perhaps a more mainstream (and contemporary) example is Fallout 4 with its critical meter, which gradually fills up as damage is dealt. I think that actually works reasonably well and may be suited to D:OS2, though it's hard to say how well it would actually translate into a turn-based game with multiple PCs.
