Default Battery life with kit Kat update, better sleep, worse when using phone

So here's what I noticed. With kit Kat stock, or stock based rooms, the battery life seems really good while not using phone. It goes in to really deep sleep and sips on juice.

Whole using it, for example Clash of Clans, it literally sucks like there no tomorrow.

I see small difference between email or xda or other not graphic intensive apps.

Anyone else having noticible worse battery life vs 12a?

My friend who has the same phone said the same. Before update he never needed to charge during the day. Now he had to connect it to car charger mid day.

Sent from my VS980 4G using XDA Premium 4 mobile app