Yes, after Castellano's departure, a new plot direction and a new character with whom the audience was completely unfamiliar was necessary. I for one would have been quite uncomfortable with Clemenza as a traitor. That's why I state that FFC would never have built a script around him in such a role. But Frankie was unfamiliar to us and a candidate for the traitor role.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
