Good idea, wrong airport
Personally I have always thought that EI could make SNN into a fortres hub. I do not have any loyalty to SNN, in fact I think that the place is a bog, a hole and a pain in the ass, but the point is that its an EMPTY pain in the ass.
Shannon has more terminal capacity and runway space than it could ever use, and the runways are definately long enough for the A380(if we are continueing the dream). The pre clearence is also a major advantage, and should be marketed far more. Perhaps it would not be a runnner to base a set of 320s at SNN but they could just do morning patterns for feed.
Personally I dont think that DUB could ever be an effecient hub for any one, its too compromised, I honestly think that the DUB is byond repair, and serious consideration shoudl be given to starting all over again on a green field site, for capacity of 50 million pax per anum. What they are proposing at the moment is only going to make the mess a whole lot worse.