Meet, preach, rave, repeat. The appeal of Cannes Lions is obvious but should it do more to bring adland closer to the people it serves? — There’s every chance your creative agency has been a little light on the ground this last week. It’s that time of year again when adland & co flock to the French Riviera for the Cannes Lions International Festival of Creativity. By all accounts it has reliably stayed on script, hosting…