Just stopped in to say that all three have strong fundamentals like the WNBA. But they still lack the obnoxious strength of personality that makes vtubers entertaining because they're either really fantastic or so awful you enjoy laughing at their self inflicted suffering. Niji EN is safe and brand friendly, and that's it's greatest weakness.
Compared to Hololive being infamous for its talents' endless stream of bad behavior and Niji JP benefitting from being located in a less puritanical regime, being a conventional brand safe vtuber is basically a huge handicap. This is probably why they were overlooked by hololive. The most successful streamers are usually insufferable, arrogant lolcows whose luscious milk viewers love gorging themselves on daily. Midwits farmers and cowfags hate and cyberstalk them, but most high and low IQ faggots understand how stupid it is to try to humiliate and cancel the cow that's providing you with daily entertainment. This is what makes Hololive so formidable in comparison.
In contrast, the conventionally personable streamers in Nijisanji aren't awful or self destructive enough to reach those heights. Big talent comes with big egotism, and all the broken egotists are clamoring for other companies like Hololive and Vshoujo.
IMO, Tsunderia might've been the better play for these three unless they plan to go full Coco and fully immerse themselves in the Japanese vtubing scene using their status as Nijis as an onramp to the overseas market. That might be the right move now that Hololive's gearing up to crush western competition with songcows and trainwreck generation 2. Holos don't need JP collabs because they're incredibly cartoonish enough in their own right. In this highly saturated streaming market, NSEN needs some sort of niche or star power to keep themselves from becoming irrelevant like Mahiro, Miyako, Haruka and Mugi.