Does anyone have a list of the changes made in the 1607 GPO update?
Did you ever find the answer you were looking for regarding GPO changes in Windows 10 1607?
Not sure if you found this useful but I downloaded this below for GPO comparison:
You can filter the "New in Windows 10" column for 1607 and get those new GPO settings that are new in Build 1607. In fact, Microsoft also included Build 1703 in the list for those who are looking at WIndows 10 Build 1703 GPO settings.
Hope it helps. :)