The policy of my Department is to actively encourage and welcome new services on all routes to and from Ireland. Having said that I would point out that since the establishment of the single market on 1 January 1993, all European Economic Area (EEA) airlines are free to operate on any international route within the EEA without any restriction on frequency, provided slots are available at airports. The question of whether any airline wishes to exercise such rights is, however, entirely a matter for the airline on the basis of its own commercial judgment.
In relation to access from the US I should point out that under existing policy on transatlantic services enshrined in the bilateral agreement, there are no restrictions whatsoever on US airlines operating services, either scheduled or charter, from any point in the US to Shannon.
In addition US airlines may operate any number of direct non-stop charter services from any point in the US to Knock Airport. Similarly Irish airlines can operate an unlimited number of charter services to Shannon and Knock from any US point and unlimited scheduled services to Shannon from four US points i.e. New York, Boston, Chicago and Los Angeles.