Reflecting on that article - a couple of things.
Debated to death previously - there can hardly be any argument that they were using an illegal car (the report does note that only one of the podium teams was immediately cleared - either Ferrari or McLaren IIRC). I also think that there was suspicion that other teams had illgeal systems too.
I wonder (with hindsight) whether the WMSC were lenient given the events of the day and not wanting to bring a further downer on F1 as a whole?