Yep, same here; MM1 does not scroll. Can anybody confirm whether MM2 is fully functional and configurable for all gestures, including getting back to the home screen or do we have to buy a trackpad for that? The magic trackpad 2 is amazing for home/office use but I don't see myself using it in a mobile setup.
Edit: apologies, below I describe Magic Trackpad 2 functionality, not Magic Mouse 2. For some reason your last sentence about the MT2 was what stuck to my mind.
MT2 is fully functional:
Slide cursor forcefully to the top right corner of the screen: bring down control center
Slide cursor forcefully to elsewhere on the top of the screen: bring down notifications
Slide cursor forcefully to the right edge of the screen while in an app: bring up slideover app
Slide cursor to the bottom of the screen: bring up dock
Keep sliding cursor down once dock is up, while in an app: app switcher, followed by home screen
Two-finger swipe up /down: scroll
Two finger swipe right / left: back / forward (Safari for instance); activate swipe actions on list items (Files for instance)
Two finger swipe right / left in notifications: show widgets / camera
Three / four finger swipe up half way: app switcher
Three / four finger swipe up half way in slideover app: slideover app switcher
Three / four finger swipe up all the way: close app, notifications, control center, camera
Three / four finger swipe right / left: switch to previous / next app
Three / four finger swipe right / left in slideover app: switch to previous / next slideover app
MT2 configuration options available:
General / Trackpad: tracking speed, natural scrolling on / off, tap to click on / off, two-finger secondary click
Accessibility / Pointer Control: automatically hide pointer on (delay) / off, pointer animations, trackpad inertia on / off, scrolling speed
Home Screen & Dock / Multitasking: Gestures on / off (enables / disables the various gestures listed above)
On a personal note, the pointer felt weird until I turned off trackpad inertia. Now it's nicely under control. I'm also still looking for information on how to hide slideover app.