Dr. Kent Anderson, president of Providence University College and Theological Seminary in Canada, considers competency-based theological education and suggests that it's really not new but a return to ancient practices of education. The co-author with Greg Henson of the book Theological Education: Principles and Practices of a Competency-Based Approach, Anderson says mentoring and learning by doing can provide benefits in the field. He says institutional humility and a willingness to adapt will help theological schools. The book can be found on the publisher's page here. You can find an interview with Greg Henson here.