One more interesting thing, I think, I have sort of “hacked” performance - while I have both pigment.o and advanced color selector docks next to each other and when I pick color from the ACS, the pigment.o plugin updates colors pretty fast, so in conclusion - it’s faster to use advanced color selector 
video link here: https://drive.google.com/file/d/1szHuFtUSqeA-IPzKA7hLcDV2zS8b242k/view?usp=sharing
PS: Despite the issues mentioned, I really appreciate all the hard work you put into this powerful plugin <3