I doubt they were picking up too many people from the ORK-DUB service anyway. And what they lose, they'll gain on ORK-LHR and ORK-AMS. Not the same level of fare paid, but it won't kill them.
BHD is presumably going because with ORK-DUB going they have no aircraft to operate it. I wonder who, if anyone, will take over. Would Ryanair be interested? Are their aircraft too large? FlyBe? Could they become Aer Lingus Regional operations?
It's somewhat ironic ORK-DUB going just as Ryanair are going down to twice daily.