In WWN, you have "strain" equal to your con. You recover 1 point per night of sleep. First aid costs strain and, usually, magical healing does as well. Natural recovery does not cost strain. Keep in mind that my experience with WWN is very limited, so I'm no expert on the system.
I'm hugely in favor of this idea. In fact, when I was experimenting with my "D&D variant" I did exactly this thing (and it was of course, inspired by 4e and WWN). Healing proportional to total hit points and healing "surges" limited by a resource that can only be replenished in a safe haven.
Tangent: Monks in AD&D 1e also have two hit dice at first level. It's 2d4, which is still quite terrible. I import a lot of features from the monk variant in Dragon 53 ("He's got a lot to kick about"), among those the d6 hit die.
Is there anyone here with sufficient legal knowledge and sufficient patience to explain what is going on? Why can Diamond just confiscate those goods? If they liquidate them are the previous owners among the creditors to be refunded?