did a couple of soft resets, checked all radios, loc,nfc, etc turned everything off and over to manual control, removed almost every live tile, turned off every background app possible, turned off glance, turned off cortana, set brightness to low, I live within 1/10 mile of my carriers tower (I see the entire tower out my window, including emergency generator) Before the update I got 3 to 4 days battery life with completely normal use, now I get 20 - 32 hours TOPS with very light use.
I think they have tweaked the software cpu throttling or something because the phone is faster but battery drains ridiculously fast compared to pre-8.1 days.