I actually feel that they didn't go quite far enough in making them inhuman in appearance. I've always intensely disliked non-human races that physically, might as well be humans but with superficial differences.
The sort of nature quality to them could have been way cooler in my opinion if their flesh transformed during battle, and they looked like humanoid monsters carved out of wood that bleed sap.
Then, when the battle ends, they return to the normal not-quite human looking state, but still don't bleed blood. It could be left up to interpretation for the player to question whether the battle form, or out of battle form is their natural appearance.
