We have a fairly deep hierarchy of View Components in places. Inside the Timeline component alone, we can have a hierarchy of StoryTile, PartTile, ChapterTile, SceneTile, and DraftTile. Do we need a Mediator for each of these components? Do we need a Mediator for the Timeline instead? Or is it even necessary to have a Mediator for the Timeline, which itself is only a child of the Controls component, which is a child of the Editor? Confusing, right? How much mediation is too much? Does every button need a Mediator? Well, that depends on how our view hierarchy is built and how much custom tending each component really needs. The best approach is to consider your needs from the top down, not from the bottom up.