Not gonna lie, reading your theories and discussions is pretty entertaining, and gives me some interesting insights. Continue, please
However, I need to clear up some things to avoid misconceptions further on.
First, Astra and Iris are indeed different people. I've been planning to make a special flashback to Astra if Blake still haven't chosen a route to follow at this point, and I still want to create it one day.
Blake (in his straight version) used to have a crush on Iris, and it was mutual. But he screwed everything up, and thus pushed her away. And yet she still helped him a lot. Without her interventions he wouldn't have survived in the slums. Blake, however, took it for granted, and convinced her that he's an ungrateful dick on top of being an asshole. He had to go through huge changes in order to make her turn back to him once more.
Bree does mention her father to Rebecca's friends at the party when they're trying to drag Blake into the bedroom (if you managed to impress her during the preceding dialogue). However, it was all a bluff. She has no influence on her dad, and in general tries to stay away from him as far as possible. Rebecca dislikes Bree mostly in «self-defence». She doesn't understand why Bree is so hostile to her, and mostly just goes with the «you don't like me — I don't like you» path. However, she occasionally tries to make peace with her. Always with the same results.
The line about people in Chinatown disappearing was mostly a throwaway, something to make the place more mysterious than it is, but I won't stop you from analysing it. As for the city being empty, while it is somewhat true, it's mostly because the inner communications are dying. The city authorities slowly cutting the far parts of subway off, isolating the areas they belong to. As for cars, they're luxury now, as the whole Divide thing happened because of a fuel crisis: there's no more oil reserves on Earth. Samuel explains it a little during your ride to Melinda's villa. Also, because everything is now commodified, people cut their expenses on education, medicine, and whatnot, and just try to survive (food production is also not as huge as before, since it's back to Middle Ages for most of the farmers. Try growing crops without vehicles or machine tools.). This is one of the reasons why Blake didn't try to run away from Melinda's house initially. He just got addicted to not being hungry every day.
As for Rebecca, there's going to be several ways to change her personality, but it won't be quick, and it will come with a cost. Imagine communicating vessels. In order to fill the second one, you gotta deplete the first.
I already answered this question about ten or fifteen pages ago. I want you to engage in the story in a natural, not mechanised, numeric way. You gotta make the choices you personally prefer, not the ones that will gain you points to proceed in a desired way.
That, and I also don't know how to add any interface elements or build the sub-menus. It's not that hard to learn, but I still have other priorities.