I'd bet FR would cherrypick the routes most likely to make a profit, so that would equal the typical routes to Spain. Maybe a few new destinations, but to be fair many routes have been tried and unfortunately failed. EZY to Berlin managed to last a good few years, but sadly ended, EI to Munich and Milan was marketed heavily and failed. Jet2.com scheduled summer service to Bergamo only lasted one or two seasons. Even the charters have pulled routes that are served from basically every other UK airport. Corfu one of the most popular Greek islands, Naples for Sorrento, Paphos for Western Cyprus!!
So really it's not through lack of trying, more the lack of demand for anything that's not Spain or Portugal. The pure lack of imagination for seemingly the mass market from Northern Ireland is shocking. If it's not Ballyponsa the Northern Irish don't wanna go!!