I had similar concerns (eh... not the right word...questions, perhaps) with the HP system (especially the idea that someone could have 1 HP left and still be swinging his sword just as dexterously as the guy with 50 HP).
So I started using the Vitality point system from Unearthed Arcana (and the Star Wars RPG). Now there's a difference between just getting beaten up and getting seriously wounded. Healing vitality points could deal with WD40's concept of healing-as-spiritual-pep-talk. Healing wound points is the good old fashioned you-stop-bleeding-and-the-gouge-in-your-forehead-closes-up.
So I started using the Vitality point system from Unearthed Arcana (and the Star Wars RPG). Now there's a difference between just getting beaten up and getting seriously wounded. Healing vitality points could deal with WD40's concept of healing-as-spiritual-pep-talk. Healing wound points is the good old fashioned you-stop-bleeding-and-the-gouge-in-your-forehead-closes-up.