Just got my 5S and put it in the Nuud case for the iPhone 5. Doesn't seem too bad. Unfortunately the fingerprint sensor doesn't work, but I'm not sure that's really a shock. The flash seems OK. It could probably use a slightly bigger opening, but 99% of the dual flash is still visible through the existing hole. No problems with the home button depth... the home button on the Nuud case is still sitting in the right position (and still as loose feeling as ever). Otherwise everything fits as well as it did with the iPhone 5.
I'm hoping that lifeproof will come up with something brilliant for the touch sensor, but I'm not sure if it will happen. I did play around with it a little bit and I was able to activate the touch sensor with a thin piece of plastic over it, so I don't think that it needs to be totally exposed.