I don't like HP for a number of reasons, and I'd like to replace it with something better. Abstracted as 'hit points' it could mean almost anything, but most people tend to read it as 'health' or 'life,' which makes turn-based battles feel like everyone is standing in place, just hacking away at each others abdomens until one of them finally drops. But that's not really how fights work, and it leaves you with what I think is a pretty weak conceptual and mechanical foundation to combat.
