"The church is about transforming peoples' lives not letting them live in their sin and delusion. And one of the reasons for the decline is that if you have no specific salvific message to proclaim or a mission statement that does not make sense of peoples' real lives, there is little incentive to roll out of bed on Sunday morning if what you think you will hear in the pulpit is a rehash of the op-ed page of the New York Times or a major whine about why the Christian Church is homophobic."
From Virtuosity
David Virtue hits the nail on the when speaking of the decline of ECUSA. Indeed what he says is relative to many other denominations too. Sadly, though, it is worth noting that even traditionalist "continuing" churches can slip into this mindest, where something other than worship, evangelism, and mission becomes the most important thing.