One other loss of revenue for FR in the future will be the subsidies from French airports. A growing row is now under way among local authorities at the fact these authorities gave out so much money to Ryanair with poor returns in terms of quality of service. Also Ryanair did not abide by what had been agreed, not delivering the number of flights that were part of the deals.
I believe this major issue will rise to the point FR will not get money any more for landing on these remote airports which I believe is the cut between profitability and losses.