The way it was balanced made Primal feel a lot more 'real' than the other Far Cry games. Normally in Far Cry you might shoot an enemy in the chest 20 times with a rifle and he won't die, simply because that rifle is cheap. In Primal, from what I recall, pretty much all the human enemies would go down with no more than a few arrow wounds. And if it took more than that, an enemy continuing to fight with a few arrows in him was at least easier to suspend disbelief for.