Microsoft listed some of the users suggestions under review, the update to Gestures beta with new features is expected in near future.
Here are some of the suggested features that we might see in future updates to Lumia Gesture beta.
- Vibrate when call answered. (Under Review)
- Put it under settings (Planned)
- Gently shake device to change songs. (Under Review)
- Silence or postpone alarms when flipping the display down. (Under Review)
- Add a small sound effect to tell when call is muted when you flip the phone. (Under Review)
however these features may or may not make their way to final version, take it with a grain of salt.
Keep checking Windows Hive for further news, review.
Source: Lumia Beta apps / User Voice