I know I'm 3 days late, but here's what's new specifically (copied from my Reddit post):

1:Keyboard looks different

2: The apps don't really seem to be different from Android 13/ZenUI 10 to Android 14/ZenUI 11 (contrary to the changelog)

3: New back arrow gesture design! (It's so satisfying! I can play with it for hours!)

4: Flashlight can blink for notifications and ringtones (and the screen can be set to pulse a color for notifications, too!)

5: "Touch sounds" renamed to "Tap and click sounds"

6: New battery chart

7: Color of clock on lock screen can be changed separately from theme

8: Monochrome theme

9: SOT indicator is back!

10: Media player has some slight design tweaks (and new animations)

However, bootloader unlock is still unavailable.