With regards to the rear wing, that article reads as if the FIA suspect that it's not just RB that are taking advantage of whatever hole exists in the testing regimes - they're the only team mentioned by name however the plural of team and car was used more than once. Ultimately I suppose it's tricky to rule a part/parts illegal if they conform to load tests applied to them and no written definition of the components has been missed or "accidently" glossed over.