From reading you post I will admit you are more knowledgeable of ISF than I am. So, please post the settings you find to be best.
I simply felt the monitor as shipped was set too bright and made off whites blindingly white and other colors garishly vivid and had serious black crush issues. I liked the picture much better using the settings from the video. I am concentrating on skin tone realism, which is much more realistic on all races and blond Caucasians but a little too butterscotch on most brunettes. With the original shipped settings every skin tone was shinny/oily.
Anál nathrach, orth’ bháis’s bethad, do chél dénmha
Display: LG OLED 65e6p, Player: OPPO UDP-203, AVR:Yamaha TSR 7810, Streaming: Comcast 60Mbps RG6 to Cat6a, Speakers: Mains Vandersteen IIC, Center, Surrounds, Rears Klipsch