The first stage of the private network will be rolled out as separate from the public internet but much like other providers it will be visible to other droplets in your account and others so there will still be a need to secure it with iptables rules depending on the services that you are running.
We are looking into the logistics of providing customer segmented networks but usually that entails some sort of vlan configuration which requires further networking automation as well as some hard limits on the number of vlans that can be supported by gear which creates a few barriers that we run into.
We are also looking into opening up an engineering tab which will inform customers of all of our current development, future development, and also provide priorities and ETAs. Often times there are new tasks which get prioritized higher which take precedence over long running engineering issues which is why some ETAs begin to get dragged out.
Our hope is that by providing more visibility into our development customers can see what other issues and features we are working on and also get a live idea of how priorities may shift if something comes up that requires immediate attention.