Translation only began in january and took a while. No idea what they still had to do then, but I guess they had to create all the translated artworks relying on the translations provided, which takes quite a while. And I know only of the translation aspect of it.
Early hands on, guess we'll have to see how much content there is. Dungeons of eternity and hell sweeper VR also have co-op modes, so they've got some competition.