So am I the only one being surprised about Migi´s lack of reaction to Shinichi revealing its secret to Kana? All it took was a "she won´t tell anybody" and that´s it.
Either Migi changed, like Shinichi changed, too. Or, and that´s where I currently stand, Migi somehow played a role in Kana´s death, somehow leading her and the other parasyte into each other.