WDR and DNR are part of your daytime problem as I mentioned. I would:
Day
Turn off WDR
Set DNR to 35
Set Bitrate to 8192. 2048 is too low
Set Iframe to match FPS
Night
Set Bitrate to 8192
Set Iframe to match FPS
Increase HLC to 75
Drop DNR to 40
Gain 60
I leave all image settings at default along with Iris (50) getting bitrate, Iframe, exposure, and gain set, THEN tweak those. Too many setting changes all at once
Thank you! Daytime captures are already way better and consistent.