Oh ok, I hadn't realised quite how strong a brand Aer Lingus might be in the States.
As to the EI codeshare on DUB / BFS, I'm only assuming they'd have to withdraw from it out of competition concerns as with the purchase of BD they'd have a total monopoly on Belfast / Dublin to LHR flights - which surely would draw the attention of the regulators. I'm sure they don't want to withdraw.