They are better than what we got, but they just don't fit in the regular schedule. Extending Chrone's death a whole chapter? A flashback of Ray's baby memories when Emma does the ear device extraction? a random flashback of the moms when they reveal their betrayal? the first two can easily fit, with chrone being reminded about her friend, and telling part of the story to the kids instead of in the flashback, but the most recent one would have needed to make the four sisters characters beforehand, and not make it obvious that they are the mothers for it to fit.