They never did without the battery saver off, it's the dirty little lie that they all say "OS limits it to 30 min" or some BS like that.
Battery Sense actually tells the truth and says "Live tile disabled" when you have saver on, if you then click on that it says Live Tile Disabled -Battery Sense won't be able to update the Live Tile while Battery Saver is on to save your battery. Turn it ON and at 100% it's ( on my 810 ) good for 1 day 12 hrs when set to Now until next charge. Turn it OFF, 1 day 7 hrs, but ON and set to When battery is low and it's 1 day 17 hrs but the battery app soon reduces that extra 10hrs quickly. The thing is 95% of us keep checking the "live tile" to make sure it's correct and most never realize it doesn't update when the saver is on. I wish there was a shortcut to the saver, it's always updated and you can turn it off or on. BTW I installed 10 of them way before amber and NONE updated with the saver on except for when set to When battery is low savings but they all drain the battery a lot, some more than others.