Windows 10 is great for desktops, fixing many of the perceived issues that Windows 8 had for keyboard and mouse users. For tablet users the fluid interface that the older OS offered has been mostly lost and replaced with desktop metaphors which make no sense.
For instance the task switcher. On Windows 8 it was brilliant for touch, swipe in from the left edge with your thumb to swap apps, swipe in and out for the app list. Simple and brilliant, no need to even adjust your hands when holding the tablet.
In Windows 10 Microsoft has implemented a new task switcher to better suit desktop users and it's very good. Click an icon on the task bar and a overview of your apps is shown.
In tablet mode if you swipe in from the left edge you get... the desktop task switcher. Completely inappropriate for the touch interface. Why not present the old touch interface for touch users, and the new interface when the taskbar link is clicked?
The right tool at the right time.
For touchscreen users Windows 10 is going to take some adjustment - and some short term pain - in the transition from Windows 8.