I bet the updates were getting longer, taking more time for devs to produce them. But shorter in content for each separate route. That's why a prefer a game with about two romanceable characters without further routes. The more romanceable characters and the more routes available, the less content will be present for each of them in newer updates.
I hope now that the NTR routes are out of the way devs give us more content for the original story: The uncle and his niece. I also hope they don't think the story is over and nothing more can happen between them, because it is precisely the opposite, lots of lewd stuff can happen at this stage in the story; all those things the MC tried to do in the beginning of the game, such as fondle Christine in her sleep, feel her body during a massage, could be done now without the risk of a bad outcome. And lots of other situations could happen too!
I hope Christine's mother visitation is a stop and go kind of visit. I cannot stand more hindrance to the main characters fun.