I still fight regularly for a meeting with clients that isn't a list of ideas or features, but is a "why do you want to do this thing" explanation from the very top. I don't always get it, but when I do the new feature right out of the gate, almost every dang time.
When engineers can talk directly to customers, when support understands the product, when sales knows what's actually possible, suddenly half the middle management layer has nothing to do.