I didn't get a clear idea of the game until you mentioned Chronicle. I think I can imagine well (not as clearly as you, of course) how the game would play, and how interesting of a story to follow it would be.

I like the player's ability to decide to choose to be good or evil, like the bank robbery scenario you explained. But usually I'd love to go with the "good action followed by an evil deed". Like, appearing in the bank robbery scene, help them steal the money, escape together, then betray them and keep the money for myself. I don't know why I have strange fixation for betrayal lol.

And having other people that the MC deeply care for--the wife and kid--really makes the player more involved with the game. Because most of the time the consequences of a player's action are applied to, well, the MC himself, and I don't think it feels as much emotionally punishing as having your wife and kid at risk because of your doing.

The thought of losing your wife and kid which will affect the main character's life because of your decision, I think it'll lift the "Your choices matter"-meter higher. Well, that's what I thought of this interesting concept of yours.