From Apple’s iOS 8.0.2 support page:
This release contains improvements and bug fixes, including:
• Fixes an issue in iOS 8.0.1 that impacted cellular network connectivity and Touch ID on iPhone 6 and iPhone 6 Plus
• Fixes a bug so HealthKit apps can now be made available on the App Store
• Addresses an issue where 3rd party keyboards could become deselected when a user enters their passcode
• Fixes an issue that prevented some apps from accessing photos from the Photo Library
• Improves the reliability of the Reachability feature on iPhone 6 and iPhone 6 Plus
• Fixes an issue that could cause unexpected cellular data usage when receiving SMS/MMS messages
• Better support of Ask To Buy for Family Sharing for In-App Purchases
• Fixes an issue where ringtones were sometimes not restored from iCloud backups
• Fixes a bug that prevented uploading photos and videos from Safari
I have a 5s, I installed 8.0.1 and it reset the Health app step count. On my iPad 3rd gen, multitasking gestures stopped working until I switched it off and switch it back on. When I installed 8.0.2 it reset the Health app step count again and multitasking again stopped working with the iPad.
The multitasking thing is not a big deal. But if each update erases my step counts I’ll be put out. So will apps that use that data.