I had the same problem with battery drainage. It was suggested that I allow my battery to drain to 0% and then charge to 100% (did that a couple of times), when I followed this suggestion my battery life noticeably improved to where my battery like is now better than it was with iOS 8.0.2
My device memory also increased by approx 2gb with iOS 8.1 (not sure how that happened)
I just updated my brand new 5s and I'm seeing the drain too. I'll try this method as well. We shall see!
Everything looks smooth..but I have been experiencing some issues in editing my contacts.
When you try to delete a space in a name or number the indicator just goes down to the next space!??
You then have to pull it back up to write again and if you delete it goes down again....
Anyone else is experienced this bug??
Thank you.
I have problems with swiftkey . Often the keyboard isn't responding. That pretty bothers me.