As in Pathfinder, unarmed attacks are nonlethal. However, when possessing Improved Unarmed attack, is that still so, or does the increased damaged still considered to be "nonlethal"? It doesn't really say under the feat description.
I am surprised there isn't an Apothecary/medic/fixer(double meaning?) class. I understand that with magic in play, there maybe many ways to heal, but I would think a more scientific class would appeal to many. My thoughts would be to make him/her/it based on the Alchemist class. They could be experts in pharmaceuticals and the ability to aid in both health (heal) and death (poison). Life science experts. I don't see this as limited. I see many possible character choices from this concept. Also, a ships medic would be a great role.