The biggest problem is that there was no real death of the family, nothing really major happened to drive them apart. There was one scene in the cave where the family says Bruce should have told them, then at the end of the arc they all make up excuses to blow him off. Nothing major, and they will team up again as necessary. I bet any money in this Riddler story they will still trust Bruce's decisions.
DofF should have been about manipulating characters, making them doubt each other and so at the end, they really have nothing to do with each other. As it is at the moment, it's forgettable because nothing major happened between the family.
The scene in the cave and the ending of 17 could have been in one issue, minus all the superhero joker stuff with the same result.