Maybe it did work operationally prior to Sonfall, but if that was the case, it probably became clear that it was an outdated system shortly after the WDF was re-established. If so, it's likely that the revision happened sometime after Gryphon got back from putting out all the fires that rose up after Largo's death.

I'm not saying that it necessarily took a long time, just that he probably ended up splitting the fleet three or four ways to deal with everything, and decided that this might be a good long-term plan.

Peter Eng
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Insert humorous comment here.