I had read both from Murray and MacIntyre when I was in the seminary. I am more of a philospher, and MacIntyre makes more sense to me because his case is based on the philosphy of St. Thomas Aquinas. It has totally different presuppositions from Murray, who is operating from the Modern Liberal Individualism that was around at the time of the Founding Fathers. This is also why Pope Francis is confusing to Conservatives and Progressives alike here in the US. Francis is operating from a 13th century philosophy, and has different underlying assumptions than any of our current batch of political philosophers and commentators. They are trying to fit Francis into philosophical boxes that do not fit him. The Pope makes perfect, coherent sense to us Thomists.
This fight is local only to the US Catholicism. Worldwide, the three way fight in moral theology between Neo-Thomists, German Jesuits under Karl Rahner, and the French Jesuits pushing Patristic studies, will have a much more lasting effect on Catholicism.
St. Michael better put a move on!