Well there have been "GBs are humans" theories for years, so I don't mind. I actually like those ideas. But I'm not really a fan of when people insert humans as regular characters into the story.
Oh, there are a number of reasons that I could give. I guess the most basic is sheer physical incompatibility. How long do you think a human is going to last alongside four foot villagers, seven foot warriors with elemental powers, facing off against fifteen foot tall monstrosities of pure embodied shadow, all of which are eighty percent robotic? And yet people make humans into some kind of uber-survivor assassin race. Just putting it out there.
I didn't notice thw whole human thing first of all - I just thought it was a really good colour scheme! Tan, black and trans-green. Unusal and effective. Nieson may not be the most complex (nice greebles, even so), but I think as far as characterisation goes she's my favourite of this month so far :D And humans in the bioni-verse? Well... in mine they're the Great Beings, so how's that Chro? XD