FERRARI INTERNATIONAL ASSIS-....wait a minute....
What makes you think they will now, when they haven't taken the opportunity every other time that a wooly rule/organisational stuff-up has brought about an expensive farce?
If they fix this one, it will only be a matter of time before another hole appears.
I don't think this is a case of Mercedes or Pirelli getting let off, it looks simply that the FIA rules are so ambiguous and badly worded that they cannot be penalised for breaking the rules as the rules don't make sense.
The best thing the FIA could do is remove the testing ban.
This is not the fault of Pirelli or Mercedes, its the FIA.