I hate the deals these scumbags get, but let me play Devil's Advocate for a minute. Why shouldn't Massino be entitled to the same deal that Vitale and Gravano got?
For that matter, look how the government screwed Casso. That guy will never get out of SuperMax, yet without his recognizing those two assholes in Eppolito's book, we might never have heard of the "Mob Cops." And those two scumbags are a bigger disgrace than most mobsters. At least mobsters don't pretend to be cops.
Because he went to trial and lost, the when it came time for sentencing, he flipped. He flipped so he could save some assets for his wife and family. But going to trial, losing, then flipping probably wont set you free.
It would set a VERY bad impression that wiseguys can fight their case, if they lose, big deal, ill just flip and go free.