One thing I like in Xiaomi of my girlfriend is the multi-function widget which from a single place opens clock, weather and CALENDAR. And despite Calendar being among the most important features, it's not accessible from the Microsoft Launcher Widget.
Yes, I agree, some don't use the native calendar client, and same goes to weather. So I believe the Widget should be configurable to select the app(s) we want to open - Outlook calendar view in my case, although it's not the best calendar ever.
Also, Xiaomi's Weather app is much nicer and easier to get information from!