1. Single and two-finger swipe down on the notification shade
2. Fingerprint sensor notification swipe down feature
3. Screen and font size (plus changing the resolution from 1080p default to max)
4. Changing the animation speed so the phone moves faster
5. Double tap to swap apps
6. Pin windows
7. List view
8. Locking an app so it doesn't close when you "close all apps"
9. Split screen
10. Pop up view action (like facebook messenger chat heads, but for apps)
Bonus, changing the navigation button order to go between Samsung layout and Stock Android/Pixel layout.