One thing I didn't fully get is:
- Why Saito Psynced with the mafia boss? Just to test it?
- What did go wrong in the psync? Is it because it was a prototype or it was explained earlier in the story? I don't remember it
I hope there's little more to "just wanna test it" because the story is cool and the twists too, but the obvious question is "if it was just for testing, what did Saito expected???".
I agree with someone that the flowchart seems kind of forced, at least because it's only hinted on how the memories are shared and not actually explained like in the 999 games. Good game overall.