You can pin nearly anything to the left pane of the Start Menu, by simply dragging it there.
Your theme syncing "approximations" are wildly incorrect. They sync a lot better than you portray.
For your examples:
Selecting "Teal" on the phone correctly makes Windows 8.1 select...
Improved? I can no-longer immediately "Like" posts I see in the "What's New" page.. I have to wait 5+ seconds for an app to load. I don't know if I'm sold on this concept yet.
The final link at the bottom also says Beta, but shouldn't, right?
I wonder if it might make sense to have these "update install tries/logs" in the Windows Update area of Windows. That way, you could see when app updates tried to install, and when app updates...