Having the 3 children not Izzy set the fire downplays the rising from the ashes story Mia tells Izzy. It made sense for Izzy to burn the house down. It's not believable that the other 3 were so damaged they would burn the house down. It doesn't work. I also felt Mia, who tells a man his baby is dead and vanishes with her shouldnt get such a happy ending. She wasn't a good person but for some reason she seems to be portrayed as the hero.
