I make use of multiple Windows Desktops (overloaded term; I mean the Windows feature accessed by WinKey+Tab press). I would like to suggest that Start11 support and honor the different desktops by exposing different groups to the user based on which Desktop is open. For example, if I clicked Start while my Design desktop was open, I would be presented with my Design Groups, or even a Start Page dedicated to the Design desktop, that way I could still scroll through my other Start Pages or even search to find a different program, but would allow me to keep my pages distinct and tidy.
I could provide screenshots and mockups if they could be helpful.
Thanks for your consideration!