I suggest adding a new field "Description" to "NetPort" and "Net" objects. Users usually give names of networks in abbreviated form, and when there are many networks, it is easy to get confused. The "Description" field would help make working with nets easier (ideally, it would be nice to pop up a tooltip (hint) when mouse over a network or port name).
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
