well, Aer Lingus is the 3rd branch of IAG and their site rivals Iberia for how bad it is. But it's in English so that helps a bit. I flew Iberia biz class to Madrid in June and I'm returning on it after Christmas. They and Aer Lingus have the new smaller 321XLR's and the cabin, the tech and the food were amaing on Iberia. 40K biz awards if you can find it.
Also, fwiw, a word of caution flying back from Dublin. They have US Immigration in Dublin airport which you would think is great not dealing with it in US. Except there are an incredible number of SSSS boarding passes given out (special intensive inspection and questioning).