OnePlus details the update, noting the following changes:
- Improved notification management in doze.
- Addressed alert slider/silent mode issue.
- Disabled fingerprint sensor while in pocket.
- Added NFC toggle in quick settings.
- Improved noise cancellation in video recording.
- Updated 4K video recording codec.
- Added latest security patches and various optimizations.
OnePlus will push this out incrementally over the next few days. And you will get the update very soon as an OTA. But if you are impatient and want to try this update right now then you can follow this XDA guide to flash the latest Oxygen OS 3.2.2.