We are all waiting for the first test case. Should an accident, incident or even an irregularity occur, and one of the crewmembers is subsequently found to have commuted into the trip, or otherwise not properly 'rested', the lawyers will have a field day. The 'Fit for Duty' check box on the flight release paperwork is causing much angst, lots of latitude for interpretation there. Suddenly, the scope of our responsibilities has increased enormously.
Many of my colleagues are now purchasing private legal insurance, as will I shortly, it would appear we are being hung out to dry.