It doesn't matter where the team is now, the Outlook Calendar is not Sunrise nor To-Do is Wunderlist.
I get what you say but the apps are gone (or soon to be in this case) and for the people that used those apps that is killing them.
I totally get where you're coming from, but Outlook is literally Accompli renamed. I see the opposition to Sunrise being folded into the Outlook client (it's not standalone), but To-Do is effectively the same as Wunderlist but their V2 that they've been gestating on for more than a year (a more to-do oriented view).