One place where this ruling will get a welcome is Ireland, where it should be one of the final nails in the coffin of the Shannon stopover policy. Expect the Irish govt to fight to protect this anti- competitive policy, but with any foresight (not to be expected) they will accept the inevitability. Reality, of course, suggests, that they'll put up a fight, just to show the Shannon-siders they're fighting their (but no one else's) corner.
One has to feel sympathy for EI; it could go from one extreme where it's transatlantic aspirations are undermined by the Irish govt policy of discouraging growth in t/a routes, to a situation of complete open skies, with the likes of VS, BD, AF or anyone else who wants to, flying n/s from Dublin.