The New and “Approved” Type of Explanation (Watchtower, March 15, 2015)
http://ad1914.com/2015/01/26/2107/
The link goes to the ad1914.com site. This is a another article in the series. It's a commentary on the first study article in the March 15, 2015 issue of the Watchtower. It's way too long, sorry, but it also tries to explain how the doctrinal change effects the doctrine of "1914" and the doctrine of the "faithful and discreet slave."
http://ad1914.com/2015/01/26/2107/