Oh well -- I think my next move is to find something open and standardized, and something I have a control over. Personally I'd see myself living in Wunderlist-land for the next 20 years. IMO I don't think I need any new features there.
From what I hear (from people working at Microsoft on the Office team more broadly, so take it with some salt): the Wunderlist team has been taking more leadership roles within Office, and the goal was to integrate Wunderlist in about every product. However, much of the back-end needed to be moved to Microsoft's tools and services, which needed a virtual re-write & reboot of sorts.
The one holdup is out IT team hasn't enabled TODO yet for our company's Office 365 account yet, so I need to use my personal Outlook account.
I was pleasantly surprised at the "My Day" feature and the task suggestions so far. I have about ~150 tasks in TODO at the moment, and the suggestions for adding to my day were a good balance of newer urgent items and older backburner items that I had forgotten about.