For me the biggest problem it's the direction, the dev failed to balance the plot conflicts with relationships, I honestly don't understand the difficulty of creating an interesting story in this sense, I mean make it simple!, I would just continue with the idea of a protagonist slightly shaken by some traumas, that would gradually "heal" himself with the love and relationships created in the game, at the same time that the shadows of the past still haunt him, at home he would have his daughters, hot wife, hot sister and not least the teacher's relationship with the students, this love would bring the perversion and corruption that could not be missing in a game like this. Only that would be enough to focus most of the game, being much less in the plot of conflicts, that would be present but more in the future of the story, based on that, create a written story of everything you wanted to happen until the desired end, and form the updates just by adapting and improving this ideas. To help it would be interesting to understand what makes famous and popular games similar to this one to be good and to be inspired by their best scenarios, why do you think the first update worked?, because people expected a direction that wasn't done after that.