Granted, Colgan was legal under FTL, however fatigue (and colgan was criticized for not monitoring fatigue) was a contributing factor.
Granted part of the reason for the fatigue is the commuting culture in the U.S., but fatigue doesn't care why you're that way.
Also let's be fair, the 7hrs30 may be a specific to the french operations if it's legal the crew department will say "it's legal" when they call you out of bed.
Also the fairly stringent criteria outlined in the original document was a 'fatigue management system' with very little explanation as to what that actually entails.
We'll have to wait till the new year for the detail.