When change is fast and unpredictable, the leader holds a clear, compelling picture of where the organization is going (the restatements speak of three to five years) and of why, keeps decisions anchored to it and the objectives in view through the turbulence, and reinforces the way forward; O'Shea's reading asks the vision to answer why the organization exists, how it will succeed and how success is measured.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.