iOS 10.1: battery drain and Health app data

Has iOS 10.1 improved battery life? On my iPhone 6s, the battery life is noticeably worse after upgrading to iOS 10. I'm currently on 10.0.2, and I have about 5-6 hours of usage depending on how much I use Safari. Before iOS 10, I had about 7-8 and more.

Also, I have seen reports that there is a bug in iOS 10.1 that erases data from the Health app. I wonder how common the problem is and if there is a way to predict if my device is going to be affected. I use Health app a lot, and I would hate to lose a couple of years of my health data.