Is there anything more annoying than an escort mission? You have to make sure that one NPC get from point A to point B, and you have to make sure they get there alive. Almost invariably, the NPC gets himself into trouble. Maybe he walks too slow and you're constantly waiting on him, or he walks too fast, plunging into danger before you clear the way. Sometimes they take a path all their own, and it's never the shortest one to your destination. In a similar vein, let's do away with Assassin's Creed's eavesdropping missions as well, since they're just escort missions wearing a Halloween disguise.