Hello there,
This will be the last time I answer to this post since you are still ignoring the point I'm explaining.
3. It was DECIDED to have the interactions happen by meeting with others instead of using a phone to call them to you and just seem like a "checklist" of names to interact with. Also, the topic of Anna/Adrian and Himari are 2 completely different things, if you have paid any attention to the dialog, you must be aware that Anna can and will take the bus/taxi to go where she wants to, this is proven by the conversation when you take her to the mall. But anyways, you are the one that's trying to bring realism, so I'll leave it at that.
4. Again, every player first playthrough is "blind", if you decide to continue playing to unlock the rest, you will probably know where events happen. This is not even accounting for the fact that there are weekly and daily autosaves to go back into and make a manual save from it. This is not an issue, is regular game design, games like the old dragon age and Witcher don't tell the player: "hey if you go this path x dies but if you take this other path y dies instead", decisions here are meant to matter, these are not the same genre, but the concept is the same, and again I'm letting you know, this WILL NOT be done.