1. We will definitely take this under consideration.
2. Theoretically can be done through advanced CSS customization, but for now changing font etc in emails is not possible.
3. WA views all member levels as totally distinct (with different fields) and so setting global defaults to emails across all levels would be nearly impossible.
Thanks for your observations and we will use other people's response to gauge the popularity of these features.
Jim Sympathy, Fluid Apricot