I feel differently. The last few updates before this were mostly focused on "finishing" existing side girls, many of which were added due to player/supporter requests but not given full storylines at the time. He's been tying up loose ends. He even said it was necessary but doing it was getting old and he wanted to get back to the main storyline.It seems to me that the developer has lost enthusiasm and is reluctantly making updates ... But there was so much potential...
It's also entirely possible the direction the game seems to be heading in isn't to your tastes. It's totally okay to lose interest in a game after a while, even if the dev is not only still actively creating content but enthused to do it.