I respectfully disagree with Pierre (Laurentian) about the sicilians they are part of cosa nostra so the structure is still there if someone gets killed he will be replaced nothing changes.
I don't thing he was saying that there will be no structure at all within the Sicilian clan. I believe what he is referring about is the structure in command which he compares to what Vito Rizzuto and Vincent Cotroni had. I think what he is saying is that there will be a change in custody of power but the Sicilian clan will still be there in my opinion but will not be as powerful as they were.
I agree they are weakened, but there are still so many left in Canada like the C untrera-Caruanas.