I just read a related blog post on the Focused Inbox - apparently it started rolling out over a year ago. Most of the 95 comments to that post were very negative, yet there wasn't a single reply from the MS Team, and the rollout has been proceeding in spite of numerous requests to have the Focused Inbox disabled by default.
I guess the MS Team likes to keep its own engineers busy - I will be calling to be walked through the process of disabling it. Too bad Clutter no longer functions to automatically filter email - I'll just keep adding rules.