Consolidation is the name of the game in aviation now. The "hub buster" 787 is not being used as such, it is increasing frequency between hubs, and opening new hub and spoke routes. With the small geographical and population size of this island, one airport was always going to grab the lions share of routes and pax once the road network was finally sorted, more so if a proper rail network is ever built. Dublin as the largest population center and being halfway between the 2nd and 3rd largest was always in pole position for that.
I remember when I could fly to FRA wilth Luftie or CDG with AF from SNN while Luftie sent a single heavy a day into DUB. Now those SNN routes are long gone never to return, while DUB has multiple daily A321s to FRA with Luftie and AF multiple daily too. This is echoed across the industry.