AerArann are now going onto the Dublin-Blackpool route after Ryanair leave.
Will they stay longer than they did on the Cork - Preswick route?
I think you'll find Cork-Prestwick was a "collateral damage" casualty of another aspect of their recent cutbacks, their pullout from Cork-Dublin, i.e. there was no longer an aircraft in Cork with time to go to Prestwick and back.