Aer Lingus Regional should give the Cork-Dublin service a try with at least an early morning departure and evening return to enable flight connections through Dublin. Guaranteed to succeed..no matter what people say about the motorway between the 2 cities and the hourly rail service..it doesn't suit business passengers who want to connect through Dublin airport.
To go from 11 services a day between the 2 cities to 0 flights in the space of a few years is ridiculous.