Fiat have done everything they can to make sure Ferrari are seen in the best light possible for the past three decades or so, and on its part FIA knows that Ferrari are an historic team and add an air of high roller to F1. There's a lot of money involved for everyone interested so it's natural that certain things will be noticed and others not. Fiat have been smart to hire specific people and put them in key positions, in order to take full advantage of their existing expertise and relationships with the FIA. There are also cultural differences coming into play -- history shows us that if this were Toyota, not McLaren, being sanctioned, the Japanese would take control away from the Europeans in the team and withdraw from the sport entirely, whereas the sanctioning body simply wants to make an initial press statement and then let the matter be buried under mountains of paperwork during appeals.
That's the intent here -- to make a press release and then let the matter be lost under the tonnage of memos, advisories, court filings, appeals, clarifications etc. The English are no strangers to this and will probably go along with it.