Well, indeed. EI does sell a couple of transatlantics as a connection (the late JFK and the eastbound BOS I think) but not every day of the week and the price is often comically uncompetitive. It doesn't sell any short-haul connections even though quite a few would work rather nicely. I've flown NQY-DUB-LYS, CDG-DUB-NQY and NQY-DUB-EDI in preference to driving to EXT or BRS but I've had to buy the tickets separately and shoulder the risk.
In future, Flybe via MAN or AMS will be more useful, for sure.