There's actually someone in the discord who has stated that they want to carry on development, so if development were to continue without the original developer, it may be smart to coordinate there.
A former Illuminati member also posted a whole roadmap for the scenes they wanted to see in one of the channels, so people could enjoy it.
I'd still prefer for the original developer to return for this, but it's been over a year since last contact so I'm not very hopeful.