These are some really good ideas. I see this game and SLavemaker heading towards a similar end goal with something like this, and i have to say Slavemaker is farther ahead because it has: a custom player-character, multiple individuals to meet in the city, multiple locations to visit rather than just "taking a walk", actual combat, individual shops rather than just one master list (which can be intimidating), and tons of actual endings. Plus it's now has the ability to own multiple slaves and talk and chat with them. Awesome.
This game has nowhere to go besides adding a lot of the stuff slavemaker has. Although slavemaker doesn't have: gangs, ability to own brothels, multiple females at one time, a bank, or the ability to impregnate girls and have sons (even if currently they all get sold)
In the long run these games are heading towards the golden game, where it's all seamless and awesome. But by the time that happens we will be complaining it's not in 3-D with amazing detail for each girl. Lol. Just some thoughts.