On a human level, getting pushed out the mob was the best the that happened to Joe B. He out lived his main opposition Luchesse, Gambino and Magaddino. He got to watch the beneficiaries of his demise (Joe Colombo, Paul Castellano, Tony Duck Corallo and Rusty Rastelli) go out in a ball of flames.... and was still able to live, probably in the same fashion if he had retired in the first place. The only difference is that he would've still had some influence over the ongoing in Ny and the drug trade (which is what I believe everyone was trying to avoid). He would've gotten bullets with Galante or more like pulled into a R.I.C.O.
I often wonder if Di Gregorio had been promoted, could that have at least stopped him from rebelling?