What is your brightness setting at? Also display resolution?
Mine has been... 'OK.'
Last night played with it more... I moved resolution to max, I've moved brightness from about 75% to 50% and I think it's bright enough at that level.
I've also finally played with BK Disabler last night more and disabled more bloatware like Samsung Health that had about 70+ services attached to it and other stuff that might be running in background like AT&T smart wifi and other things I didn't need like DriverMode, DirecTV apps, etc and only been overnight but battery drain seems to have improved.