I've been using Good Lock with 6.0.1 with Nova Launcher since the day it was released on Verizon with no issues... everything runs/looks nice and stock!
Oh, I don't use fingerprint unlock though.
Just installed and the only thing I noticed so far is the volume (mute, vibrate, etc) menu is the Kit Kat style and the priority settings are gone...
Still no flashlight setting in the notification panel!!