Hmmmm yes the runway is 7000ft but there are several runways around the globe that are just over 7000 ft i.e. St Maartens is 7,150ft and it is capable of taking 747-400 and other heavies. I dont see why cork couldnt take A330-200 for example. Also EI used to lease MD-11 to operate US routes before, could they not just lease 767-200 / 300 for the same purpose??
Or how about AA, they are pulling newcastle they could easily switch their 757 to cork, and operate ork-bos. That would be ideal. I know that AA have reduced their frequency to snn over the winter, I think the same operation could be run out of cork.