Must agree with 840 on the above that CSA would lose out too much on the interlining business if the flight no longer overnights at Cork. The CAA might as well pay a little towards the crew's hotel accommodation especially when you consider the kind of uniquely generous incentives awared by Shannon to Ryanair?
It would be better for CSA to send over an ATR-72-500 to Cork in the evening for an overnight rather than turning around a 737 in the middle of the day. They need at all costs to keep the one advantage they have with the interlining traffic.
Who knows, this whole experience may even be postive for Cork if it jolts the CAA into life to be more agressive in keeping the business they have all ready?