It is incredibly ambitious and very well done. Of note is the fact that stuff happens in this world even if the main character is there or not. The player may set off a chain of events that occur in a location that he may choose not to visit at a particular time, but they happen anyway and there is consequence later in the game because of it.
Ideally what I see is a dynamic world filled with characters with certain wants and needs and routines that may change due to character interaction with them. For example, a girl you see every day at the library may not be there after certain interactions, you may find her at the gym instead depending on what you did or what events you set in place that affected her.
You start the game with some skill points that you can assign for example, Charisma, Intelligence, Physical Attractiveness, etc. Even things like Niceness or Sense of Humor can be potential attributes. You need to be at a certain skill level in an attribute to unlock certain dialogue options or even have a certain combination of skills at certain levels to unlock other options or certain activities. These skills can be increased in game for example, going to the gym a lot can increase physical attractiveness.
Also you can choose to be either male or female which drastically changes how the game is played, as well as choosing sexual orientation. There is also resource management to consider too. It starts off low. You also can buy things like Gym Membership and University Enrollment which increases the areas you have access to, the skills that you can acquire and increase, and the people you meet at various locations.
For example, going to University and taking Psychology may give you hints during dialogue choices. Right off the bat you have to get a job what will be available will be determined by what attributes you picked. So you can start off in the lowly mailroom or security guard working the night shift at an office building for example. If you have good Dancing and Physical Attractiveness scores you can get a job dancing at the local strip club, or being a bouncer, or being a bartender, or being a model, or picking up the photography skill and being a photographer.
Each job may give you certain perks you can exploit. There could also be a way to progress in certain careers or you could meet people n one career that may open up another career path. As you progress in the game more work and recreation options become available. You are also desperately trying to get to the next higher lifestyle.
So now instead of picking up girls on dates in your run down jalopy, you have a decent car and a decent apartment to entertain them in. For some dates that may be an advantage. For others not so much. You can afford the good wine and play truth or dare in your hot tub for example.
Eventually you could end up in a mansion, be a member of the expensive country club, go to galas where all the models and celebrities in this world hang out, and attend the secret Playboy Mansion type clubs. What I think this would offer is a more immersive game where you have to think about more than getting laid. As for income for developers, I could see this game using a free to play model with a cash store. It takes away nothing from non playing characters but allows players willing to pay the ability to bypass content or invested time that they have no interest in.
This could prevent rolling a new character. Better yet, if there is a character creation system where you physically create your own character you could add in cosmetic items at the store as well.
I know a game like this being made is very unlikely but I think it would be a great boon for the industry. With the right developers such as yourself involved it would prevent the game from becoming misogynistic male fantasy which would be horrible. Different developers also have different sexual turn-ons and it would be great to have that variety in a larger game.
Also, the developers who have provided content free due to it being their hobbies obviously have a passion for making these games.
Monetizing the game is important not just to make sure the developers get compensated for their work, but to show that games like this can be economically viable. Distributors such as Steam who have no problem peddling excessively violent material but turn their nose up at sexual content would have no choice but to take notice.
Plus, well made games with sexual content are very few and far between, so it is basically a market with a lot of untapped potential. This turned into a much larger rant than anticipated.
I was just going to say you and a lot of people on your Erotic 3D Dating Sims List should collaborate and make some games together and be done with it.