Stephen Kavanagh gave a talk on Aer Lingus yesterday evening and said:
1 - A321NEO (LR) order will be finalized and announced in a few weeks with aircraft to work US and European services. RTP said 7 but I wouldn't be surprised if it was higher.
2 - 2 additional A330 will join in 2018, would take A330 fleet in DUB to 14.
3 - No business case for A330 NEO or A350 due to fuel and costs, 9 A350 still remain on order books. So likely they will stick to new cheap A330's instead.
4 - Like LHR-MAD, A330 will likely be deployed on DUB-LHR for cargo in the future.
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On a different note they are going recruiting cabin crew in Italy next month, could VY operation if correct be bigger than just BCN.