If I had to guess, the Dev isn't happy with all the attention and fan fare the Spicy mod received (also probably why the spicy mod was abandoned...Dev asked him to stop). The story seems to be based on an alternate reality, where a relationship like this can exist with no repercussions. Even if the relationship score is in the negatives, there is no disrespect or hurt feelings at any point in the main story...even the cheating path is respectful.
After seeing how just about everyone loved the Spicy mod, it showed that just about nobody shared his vanilla viewpoint on what an open marriage actually does to a couple.
Personally, I wish he applied what the spicy mod brought to the story, and took it from there, but I think his heart just couldn't do that to the story. Ever since the Spicy mod, the updates took longer and longer, the pure hearted, vanilla sexy slut story has been tainted...I could be off base, but just my observation.