Minor spoiler
I have a lot of question when I finished chapter 10 and after reading Mary's side story I can confidently say that I am thoroughly confused.
WHAT THE FUCK IS EVEN HAPPENING
but I kinda get why we need to have Isaac as our protagonist now, because everyone else seems to have this malicious quality on them and as shown on the side story, Mary have an apparent interest in Isaac in particular which is reinforced by the event of chapter 7 - 10 where we get a glimpse of how weird the world of this game is actually is.
Why does Daphne find it so weird for people to want to do the right thing? Why does everyone find the state of economy being held by one major power normal? Why does the name Pandora and Prometheus not trigger a red flag on people if the world of this VN is based on the real world but is diverged at some point in the timeline according to what we're already shown so far?
Amazing writing