Yes, I've been having this problem for the last few days, phone is almost completely draining overnight, battery history shows it isn't sleeping at all, even after enabling sleep mode between 11pm and 5am.
I'm already turning off Wi-fi and mobile data when I go to bed (always have done), I don't use Google Now but it appears something withing Google Services is keeping the phone awake, I haven't been able to narrow it down it yet. I'll try turning off Location completely before I go to bed tonight I think.