Something I've wondered recently was why the skin-spies aren't used in a more combative role. I mean they're basically supersoldiers. Strength, speed, senses, and utterly driven to achieve their goals (oh yeah and they can change faces). Even Cnaiur and pre-sorcerery Kellhus had trouble fighting them, so imagine an army (or hell, a hundred of them). Plus, their usefulness as spies seems...not all that useful, especially not anymore in the New Empire. There's also the implication that the Consult is running out of them -- Aurang muses about "how few of his children are left". So who made them, and why did they stop? They appear to be a relatively new creation, as we've never heard of them being around during the First Apocalypse.
I do hope we get to see some kind of crazy, brand new Tekne creature in TUC that the Consult has been working on.
ETA: I've speculated before that the Bashrag were made from humans rather than Nonman. Their descriptions always seem to lean towards human-analogies rather than Nonman ones, and they also have hair.