Have you done any modelling with various child currency parameters to see how well they might track the desired asset, and how healthy the escrow fund remains?
Best question yet.
I have thought about this endlessly. You can't begin to imagine how many nights I laid awake thinking about this. My first proposal had a much more complicated method of providing stability, but I think I've boiled it down to the essence of what is needed.
I actually plan on running some experiments with unsustainable currencies (where the data stream the currency is based on just keeps publishing bigger numbers), just to see how long they last and how they die. I'm hoping that will help tune the parameters for real currencies.