1) No release date as of yet as there is so much that has been added and still needs to be added. The reason for this is as I was working with networking for the kit I was trying to get an open world mmo feel to it but come to find out Unity is not ready to make that step yet. So it will be more co-op based along the lines of online but controlled with the amount of users and the map. Think of Left 4 Dead.
2) Starter Version is pretty much set in stone unless I need to make changes/bug fixes to solve issues and I might randomly add some small things to the kit but for the most part I am focusing on the Pro version atm.
Let me know if you need any other information James :).