I think one of the allures for Downton Abbey is that in spite of appearances everyone has their Achille's Heel. This reality invites us to join in the plots because we are no different from the Dukes/Duchesses or No. 2 Footman/cook. We all hold a tension between "appearance" and the "Achilles Heel" Same/same with folks in the Bible: kings, prophets, warriors, and Moabite women; struggled w/ this same tension. That's why "grace" is the great motivator to keep going regardless of falling short in appearances or because of that hideous heel.