I'm personally happy that the new home button will be on top of some apps like maps, unlike on Chrome with the full app bar visible with the home. Moreover this behaviour is also likely to confuse users.
Bluetooth settings will be Revamped in Android Q.
Bluetooth Settings page will act as the central management for all devices connected via Bluetooth. Detailed battery information of your accessories, forget the pairing of an accessory, manage Assistant and notification settings, change touch controls, control audio tuning, and toggle in-ear detection are some options which will be available there.
Digital Wellbeing is now integrated with Google Pixel Launcher in latest Android Q beta Update.
When you press and hold on any app icon there will be a new 'Pause app' option. By pausing it Digital Wellbeing will restrict access to that app and prevent it from disturbing you with notifications.