Icstor should drop the work of this game for a team and make the other stuff he wants, like the Milfy Kingdom or any future project. With the money he's gaining now, it could definitely possible to do that.
But this pattern of starting a new game, three steady releases, then a fourth one without the same interest and all following them being basically rushed for a new project hurts the trust that the players and his fanbase have on him.
I just hope that, when Milfy City comes to an end, someone from the fan art thread will pick the project and give an decent ending for it, including the side characters and such.