According to Apple's release notes via Mac Rumors, iOS 9.0.2 contains the following:
This update contains bug fixes and improvements including:
- Fixes an issue with the setting to turn on or off app cellular data usage
- Resolves an issue that prevented iMessage activation for some users
- Resolves an issue where an iCloud backup could be interrupted after starting a manual backup
- Fixes an issue where the screen could incorrectly rotate when receiving notifications
- Improves the stability of Podcasts
As this is a minor update which appears to have been released to fix a few very specific issues, we do not expect that it will contain any improvements for VoiceOver users.
iOS 9.0.2 is available via Over-the-Air Update in Settings> General> Software Update or via iTunes.