And BFS management wonder why people use DUB saves money and a airport experience far more superior to what BFS offer.
People from NI use Dublin to:-
1. save money
2. It's maybe handier if you live in Newry etc.
3. There is an available route from Dublin that is not served from Belfast.
4. A combination of the above.
I doubt that anyone will use DUB over Belfast purely on the basis of the 'airport experience'. Frankly the 2 hour car journey will kill that.
Dublin will always be the major airport on Ireland, and as a result will pull passengers from NI. It is exactly the same as the drift from Bristol to LHR.