Let me start by saying that I mostly agree with you. It;s a fun game with some depth to the characters. My disappointment is that it feels half finished. Have you gotten to the point where you can play "Endless Summer"? It's a duplicate of the basic game without an endpoint. All well and good as far as that goes but you get anomalies that shouldn't be there. For instance, Akira says that she has to go pee. When she gets into the bathroom there is a bit of monologue where she says something to the effect that she's not sure how a girl pees as she wasn't able to pee when she went to the hospital. At this point the game is into its fifth or six week. Akira hasn't peed for 40 days? There are a number of instances like this. None of them really serious game-breakers, just little jolts taking out of any immersion you were experiencing in the game.
There are other issues like that but many are related to cultural differences between Japanese culture and American culture.
Last thing I found disappointing was the graphics. They would be fine if this was mid 1990's but it's 30 years later and the graphics are lame.

All that being said, I have played it two or three times already and will probably play it a couple of more times just to see what the different outcomes are. I keep wondering what happens if Akira is able to limit her climaxes to less than 100. Do we see her transformed back into a guy? Or what, if anything, might happen if she goes to the bathhouse enough times? Or the various outside locations? There is a line of stars under the location name. As each location is visited, one of the stars light up. If Akira visits a site more times that there are stars for it does that do anything? Can she go to one of those sites more times than there are stars for it?
Another thing I think is missing is an indicator for when Akira exceeds her 100 climaxes in 30 days limit. When she awakens on the 31st day still in female form something should happen, even if it's just an "AUGH!! I still a woman! I didn't change back!" outcry. Or she could awaken in her female form and say "Oh, [protagonist's name] I'm a woman! Isn't it great!?"