You're probably right jf. The switch to the Jet Blue Terminal gives Aerlingus a new diplomatic excuse to give to the local media and the Chamber of Commerce as to why they can't start a Cork service. For decades it was the Shannon Stopover although we now know that the old bilateral never prohibited such a service, then the A330 was too large. No one forced them to order A330's in the first place.
Why don't Aerlingus clearly state that they have no interest in starting a transatlantic service from Cork if that is their position? At least then we can stop dreaming. Of course we have also had frequent statements from various airport spokespersons talking about transatlantic services. Most of these are in soft focus interviews. Only trouble is that they're always aspirational and the estimated start up dates are always several years into the future.
Needless to say they've never materialised apart from the Charters to New York and Orlando in the 1990's when the late Barry Roche was manager.