He was wrestling a bit with what Bryan Chapell compared in the Expository Model and the Mass Communication Model (mass communication as in providing the a short sentence or so summary of doctrine and then unpacking a lot of practical items quickly with lots of stories).
These are the four benefits he came down on for Expository Preaching. You could make them demerits of the Mass Communication Model.
1) It teaches people how to read their Bible.
2) It teaches discipline and maturity.
3) It gives you a greater opportunity to feed the sheep.
4) It endures through the ages.
Read the whole thing here. It is thought provoking and helpful.