I updated right after it was available.
I normally charge my phone every night, so I'm not seeing a lot of difference. I also added a fitness tracker to the mix, that has bluetooth running all the time for real-time syncing, so that is also reducing battery life of me.
FWIW...I hear these same complaints with every release of a new iOS. Not sure how they get started, but I have rarely experienced a battery issue related to a system upgrade.
I say, upgrade ....
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