Regarding SEO, What’s stopping maintainers from vandalizing their own fandom page?
It would not be difficult to make a bot to update fandom page with a convincing but slightly wrong info, after a few hundred iterations, it’s all useless. Go look at what google recommend and do complete opposite. I’m convinced this will bomb ranking and put whatever wiki they migrated to at the top.
I would not place my hope on kadokawa doing anything like that. I don’t think they even care about anime industry aside from make money part of it.