Marangello and Sabella were both shapeshifters when it came to loyalty. They were true mob survivalist, they went were the crown was but I think because the came up on the the original Family, they would always look towards someone like Galante with reverence (Lilo gets a lot of hate but they guy was highly productive for Joe B). I think that Rastelli had the same failings of his predecessor Paul Sciacca and IMO, they weren't "impressive" enough (if that's a good word) to follow the likes of Bonanno, Garofalo, Galante, Evola.