I can't believe how bad mine is too. I bought this phone because of its supposed good battery. If this doesn't fix itself soon I'll go mental.
Yeah I think it's a combination of the Exynos processor having poor efficiency on LTE and the sensitivity of the motion stuff (lift to wake etc). However I have found that if you enable the adaptive power mode that you do see improvements. Battery seems to be getting better each day at the minute. Been a light day today but I have only used 33% battery with 2 and a half hours screen on time and an hour casting to my smart TV.