Browser overrides like this are definitely in the negative UX column, but better bluetooth controls, a new consolidated settings panel, and smoother window management are all positives for me. FWIW I haven't hit a situation where I've been forced into edge (yet).
- More snap zones and ways to trigger snap
- Snap zones can be pulled up or switched to as a group
- More things moved in the Settings app
- Settings app is now uses a more traditional left pane navigation instead of a list of large boxes for touch
- Window layouts better remember and adapt to monitor changes (such as unplugging from an TV)
- AutoHDR
- Separate wallpapers to different virtual desktops (makes remembering where you are easier)
- Defaults to the new Windows Terminal
Some of the other changes (mica, new start menu, new context menu, rounded window look, new themes, taskbar tray area changes, variable Segoe UI, new Store, widgets) I'd call a wash. They are there and changed but overall I can't say any have been particularly noticeable or helpful like the above items.