This issue was discussed on Newstalk's Saturday sports show with Ger Gilroy, in light of McClean's comments during the week. Malachy Clerkin was actually quite critical of the whole thing. The essence of his argument being that there are not many successful Irish internationals that have come from the North, citing Gibson as the exception. He also seemed to argue that the FAI are denying these players that aren't successful the opportunity to a long career with NI. That's my impression of what he was saying, I'm open to correction if anyone else heard it.
Few holes worth picking in his argument. Especially in relation to Gibson being the only successful player. But, I don't think there are (as yet) any North-born players out in the international wilderness as a result of their decision. Wilson is still in the mix with Ireland and O'Kane and O'Connor managed to switch back to the Northern Ireland side. There are plenty of young players with bright Ireland careers ahead of them i.e. McClean and hopefully Paul George and Daniel Kearns.