If The Commission had been intact and it was put to a vote, sure they could've been demoted/killed. But there's always a lot of politics at play and in this case The Chin was in bed with them regarding the Gotti/DeCicco hit, so he would've voted against it and use his influence to make other families do the same I think..

But the whole situation is all very hypothetical of course and such an outcome is always very hard to predict..