I've had 4.4.2 on my UK Moto G for nearly a week. Had similar problems for the first couple of days with standby battery usage being very high but it has settled down now and I'm back to a 1.5 to 2 days between charges and around 6 sometimes 7 hours screen on time. I did factory reset after the update, and a reboot after the first day of silly battery drain, plus a single complete drain recharge cycle seems to have cured the issue. Location services are what is causing highest wake-ups for me - still not happy with how long the phone is kept awake, but can't really complain about the battery life