@SilverWolfAngel Yeah, husks can think. They just... They're missing something, they're off. Maybe its their personality, or emotions, or both, is up to the player.
@Zetsukothe explanation for the physical defects is good. But, um, the back story...? I was hoping for souls to be a one survivor group thing. Maybe, we go with your second idea, but that wasn't a soul, he was just tested on. And then when he gets a soul it can make him more.. Eh what's the word, volatile? But, though husks are better equiped, they still can die of dehydration and starvation, which is likely to happen in the desert wastes, out side of the oases. And, survivor settlements are hard to find.