Cork's Evening Echo has an extensive report on a meeting of the South West Regional Authority attended by Airport Director Pat Keohane. The report makes for fairly grim Reading with no sign of a pick up in traffic.
It appears that many airlines do not wish to even discuss new routes into Cork due to the possibility of having to go head to head with Ryanair. Tomorrow Evening Echo is said to feature an article outlining the chances of Cork getting a transatlantic service. I would say slim and none as long as it's owned by the DAA.
It seems illogical to have 3 airlines operating to New York from Shannon and none from Cork. If all three are profitable then Cork should be able to support one airline.
Of course there are complicating factors, some political some historical and others just plain nonsensical.