Anyone who believes that Bolton can be an agent for reform at the UN is fooling themselves. His reputation preceeds him and there isn't anyone there who is going to accept his leadership on anything. It would be as if France announced that they were going to appointing Jacque Chirac ambassador to the US as an agent of change and reform in our country.
His job is to promote and defend American policy.
Our veto and his leverage with it are what is important.
Playing nice with international lightweights and arrogant thugs is not his job.