Does not look like humanity at large has yet known of my issue. Googling 'Mso20win32client.dll 16.0.6925.1014' yields 0 hits
All I can find is this file got updated April 5, 2016, update for Office 2016 (KB3114535) Mso20win32client.dll 16.0.4366.1000
This is a major step in my daily workflow. Sad to see it broken like this. Change is hard specially at my age.
I'll keep an eye for future UR & Office updates. Hoping one day it will fix itself.