To me this game was all about Karen and Nikki.
The rest of the women were incidental, but from the start he bonded with Nikki, and despite running away from what she felt for the MC, she went without sex - well male sex anyway
- for around a year, until she attacked him in the shower.
So Nikki lusts after him and only holds back because of her sister Karen, who Nikki thinks would benefit from a good seeing to by the MC, and finally in the last episode Karen has realised that too!
So now the proper end to the game is the MC living and sharing a bed every night with Karen on one side, and Nikki on the other.
Ok - you could include Haley and make it a foursome, but she would need to have some bi action with Karen.
Otherwise where else can the story go and not turn into a 'lost the plot' farce.
The doctor, the policewoman and even the dress shop owner make pleasant side quests, but are not serious contenders for the MC's ultimate bedmates.
Some developers drag out a story and as a consequence the popularity fades. I tend to look at what other stuff the developer has produced in the past, and will respect the game maker for his track record.
Stiglet has produced something of quality here so far, and it would be very disappointing if he allows it to go on and on and downhill rather than giving it a good and plausible ending, and then producing his next masterpiece.