The Mirarchi thing is interesting. Perhaps he was further removed from the murders of Vito's father and son, along with Renda, Cuntrera etc.
That being said, I would still have to believe Desjardins continues to be a dead man walking. I can't see how they can allow his betrayal.
The Mirarchi clan is still a mystery they seem independent. One of his guys is Francesco Catalano at first I thought he was Sicilian but I now think he may be from Reggio Calabria. They were also linked to the Bertolos who worked for Arcadi. Maybe Compare Franco is now bringing everybody back in the fold.