What’s Missing From the Three-Fold Mission?

I don’t really know much about the history of the Three-Fold Mission of the Church:

To Perfect the Saints, Proclaim the Gospel, and Redeem the Dead

(Perhaps someone can refer something to read)

I do know, however, that the Three-Fold Mission has been a central component of my church experience as long as I can remember. It seems, in most regards, that the Three-Fold Mission is meant to express the purpose of the Church (a “mission statement” for our religious organization). If I were to restate it succinctly it would be something like: To make (and keep) people a part of our church.