A few notes from someone who watched Holo in that Era
She always did coomer shit
Her collabs with Haachama and Marine were great
Her other collabs could be hit or miss with others as she had a real hard time keeping the coomer shit in her pants as it were
Haachama was the actual one who leveraged EN talent. As she would routinely stream in English for an English audience.
Sure Coco would do that meme review thing, but that was still for the Japanese and thus was a cluster fuck for EN only viewers.