I do agree that EI are able to operate outside of DUB with a successful base at ORK, but name a major LC based their with a wide variety of flights to Europe? FR offer limited services.
EI's Cork base is doing very well with speculation for some time of a fifth based aircraft. I don't agree that Cork's european flights are limited to EI. The reason for FRs Cork base being so small is the ongoing fued over airport charges at Cork. However Centralwings operate to 3 Polish destinations from Cork, Wizzair operate to two, Aer Arann operate to two French destinations, Malev operate to Budapest and Sky Europe are to commence Cork-Bratislava in October. The reason that no other LCCs have a major presence stems from the Ryanair-Easyjet Gatwick debacle that showed that while FR don't want to have a major presence in Cork they don't want anyone else to have a presence there either.