I have finally decided to stick with 8.1.2 and now have no choice to go back as Apple is no longer signing 8.1.1. I must also admit that I may have been a bit paranoid about my battery drain. I've been on 8.1.2 for the past two days and have been getting better than 11+ hours of usage time per day, although I don't have ApplePay set up as 1 member suggested may be an issue. After reading the above blog and watching my Ip6, I just may be one of those "over obsessed users" worrying about battery life too much. Thanks though to thegrants for teaching me how to restore a previous build. Time to get back to the real world for now.
Anything over 10.5 hours of usage time is very good, unless you're just listening to music. Your phone seems fine to me.