As an outsider Rowan Williams strikes me as being a complete flop as an archbishop. He seems to be equally reviled by conservatives and liberals in the Church. Bishop Spong, of all people, publicly criticized Rowan Williams for putting unity before truth! I think the presiding bishop of the Episcopal Church is a much better bishop and leader than Williams, even though I radically disagree with her. Why? Because she is very clear about where she stands on these important issues, and has the courage to stand up for what she believes to be true.
A bishop - especially a presiding bishop - besides being well-educated and having lots of ministry experience, must also have clear convictions on the nature and purpose of the Gospel and the Catholic Church. Nothing hurts a church more than when theological murkiness and ambiguity run amok.