This might be "controversial", but I found the chapter kinda lame. First, this whole info dump. Never a fan of that. Second, this entire "everyone's just a super nice family and there's no real reason why Grace is the way she is/was, just a misunderstanding". Third, that someone with that family would somehow be the villain in a story like this - that's not how these are games tend to be written, so it doesn't really make in-genre sense (though that was always going to be a problem).
I agree that the development of the cage being broken might be interesting.
..
. what if she's now in a certain comatose body? 
But we'll just have to wait and see I suppose.