What I think are unrealistic
Basel, Stuttgart, Hamburg, Lyon, Billund, Helsinki, Hannover, Halifax, Washington
What I think are missing
Prague, Venice, Bratislava, Riga, Vilnius, Krakow, Pisa, Luton, London City, East Midlands, Berlin, Gran Canaria, Palma de Mallorca, Malta, Nantes, Toronto
Certainly Halifax (!) and Washington "out there". I agree that Prague and EMA are missing, Bratislava would be well covered by VIE and one baltic route, ideally Riga with airBaltic would probably cover that region well, perhaps this is the thinking behind Helsinki? TBH and route into Scandinavia would be great.
The Spanish Islands are well served by charters in the summer, I assume they are not on there because of this. Although there is an argument that charter is not quite the same as scheduled service.
I assume that the airport feel that the London region is pretty well served from Cork at the minute. Any additional seats would put even more pressure on the LHR service, which is downsized this summer.