Juding by the game version, this game is very close to its final release is it?
Nope.
Oni, the developer, clearly has no idea how game version numbers work.
How the numbering works is already forgotten, and thus there is some betting about, if after version 0.999 it will be 0.1000 or 0.9991, but the lettering at the end already makes no sense. There was a brand new charater, Jean, and the new systems with her, added between letters.
Also... this is at least announced as a mechanics sandbox for the future full game. Thus why everything that is added are new girls, new poses, smaller systems and the like.