I would be happy to take that flight going to continental Europe replacing overnight flights to other places. I'd stay overnight in Dublin and then head in the next day. I used to take the BA day flight to LHR and then get the last flight out to Paris. BA cancelled that last Paris flight of the day, so that doesn't work anymore. Don't know if there is enough business there for EI.
Because EI is not a high priced J class, it might compete effectively.