Not saying they cannot make a go of this, but given the sheer lack of slots for long haul and new long haul aircraft coming on stream at a rate of 2 per month. Come next March the demand for slots could be quite different to now.
It's not a net gain of two a month, the B763s and older B744s are getting parked as the B788s and the A388s arrive. Chengdu and Austin are the only new routes for 2014 thus far. I think if BA want to serve the Irish market, it's important to have the BA product and presence in place. They already co-habitate with close partners Finnair and Iberia in Europe, I don't see BA's customer base asking for an Aer Lingus monopoly out of LHR to DUB/BHD.