Exit Interviews for Fallen RCs?

Over at her "Faith and Reason" blog at USAToday, Cathy Grossman highlights a suggestion by Father William Byron: As the Catholic Church continues to lose members, turning "former Catholics" into one of the largest self-designations in the country, why not conduct the equivalent of exit interviews with those who are leaving. Indeed, if you look aqt the comments' section, you will find people already listing their reasons for leaving.
If the bishops are going to take the New Evangelization seriously, this is a good place to start.