The marker is not a meta call. The marker is a verification label. The desk still labels the brief with a source class and a competitive impact note. The marker is an additional label, not a replacement.
The marker's value is in the cumulative read. A team that plays three consecutive stages in the "before patch" marker is in a different competitive posture than a team that plays three consecutive stages in the "after patch" marker. The desk has always published the underlying facts; the marker is a presentation layer that makes the facts easier to compare.
The marker is also a discipline for the desk. A marker that is not verified against the patch publisher does not get published. The desk would rather publish a stage without a marker than publish a stage with an unverified marker. The marker inherits the desk's editorial standard: the strongest source class wins, and the calendar is updated in place when a correction lands.
The marker is published at the same cadence as the format calendar. The marker is updated in place when the patch publisher publishes a revised patch window. A correction is published as a stand-alone note if the marker is reversed. The reader can compare two calendars without re-reading the stage brief.