Wow. That's worse then the s3. I would check how your settings are maybe? But I'm sure already have.
Mine took only a little hit to the battery, but still pretty good. I did notice some apps i've had for a while suddenly took up more space than usual, and my wi-fi doesn't seem as good as before, maybe it has nothing to do with update, but that's what i noticed so far.
My battery is just getting better... I never let it drain all the way but doing a little math it would end up about 13-14 hours screen on time per full charge...love this thing