What, exactly, is the threat to Irish airspace? The only possible one is Russia, and if things got to the stage of Russia attacking Ireland (!!!) what use would a couple of light Korean baby-jets on QRA be?
Where's their C & C?
Where's their surveillance radar and fighter director system?
Looks to me like a silly solution in desperate search of a problem - or are they afraid of surprise incursions by uninvited British sausages?
Much more likely it's just Empire Building.