I don't think they should overturn the decision. I think they need to start a full blown investigation into ped's, judge corruption, payoffs, etc, but I don't think they should take the belt from Bradley. Yes, it was the bad decision, but this wasn't something like the Dawson and Hopkins fight where the ref made the wrong call and things needed to be corrected. They should use this opportunity to bring about change, but don't start by taking the belt away. Look into the situation and from there see how things can be avoided or improved on.
Bradley could have used this controversy to really propel himself if he vacated on the grounds of "sportsmanship" or something like that. But it's about money, and very rarely will you see atheletes who are "winners" publicly declare that they don't deserve the title, the win, the metal or whatever it is they are competing for.