Ed Stetzer asserts that missiological cooperation is often the doorway to theological compromise and explains the tensions between cooperation and theological vigilance, as well as how the level of necessary theological agreement goes up depending upon what local congregations are attempting to accomplish together. Here's the link. I'm thankful to Ed for his insightful and thought-provoking answer to this question.
Andy Johnson, a pastor with Mark Dever at Capitol Hill Baptist Church, hits the ball out of the park dealing with the idolatry of pragmatism in church planting and missiology (here's the link). He specifically mentions Garrison's Church Planting Movements and indirectly refers to Greeson's The Camel. Johnson is a trustee for the International Mission Board.