Great plugin, @Minecrell !
No way ! - Me, 2016
When the Alpha / Beta world generation were replaced by the new b1.8, There was a huge sadness for me. And you're one of the rare skilled modders who could make these nostalgic plugins, like Ted80 (OWG/RWG/FWG) or Barteks2x (173generator).
So I think you've done a complete part of Sponge world generation plugins.
If you can keep it updated this would be great !
And if you need any help you can ask me ! (Don't trust me I can't remember a java lesson)
In short, THIS IS AN ENCOURAGEMENT good luck to you !