I personally don’t think the current iteration is meant to be an online reference. I look at it not even as an ebook but a simple digital copy of a book.
Yeah, perhaps the intent is to just get people interested and bootstrap an eventual printing via merch sales?
It would seem a bit lacking in context without the video intro, though, to understand that it wasn't necessarily meant to be consumed in the format they've giving you now.
Kinda wish they'd stuck with that. It feels like they made a bunch of decisions in the design that made sense in that context, but would have not been ideal choices if you were designing it as an online reference.
Still cool, and glad they did it and made it available. Hopefully the license means we'll see some nice improvements.