That's blowing things way out of proportion, totally. If anything I could see BA operate a 2/3 daily service - Aer Lingus look more and more likely to be Star bound and their's good feed through Star at LHR. Why would Aer Lingus consider axing a route which they have operated since the early 60's and thus would be handing the traffic to BA? Aer Lingus are well up for competition and BA's entry to the Ireland market although I believe misguided now serves a purpose following Aer Lingus' recent developments - At least to BA.
Its being real as I would imagine that BA codeshare is more important to EI from ORK and SNN likewise for BA over DUB.
Turkish Airlines have operated a B737-800 for the last few days on DUB route and have it schedued for the next few and there booking system is showing an A320 so they do not sell for larger aircraft.
I used the wrong aircraft type for my August figure forgot that they switched after that.