Yeah, I appreciate that trains waiting for ferries experiencing delays due to various events such as tidal, stormy conditions, technical issues and so on etc; is largely problematic.
Again, it is unclear what proportion of ferry passengers who avail of Rail/Bus services at Rosslare Europort is unclear however; if the numbers are relatively low then it would probably not justify causing further inconvenience to other Rail/Bus users elsewhere on the same network as this could potentially lead to serious knock-on effects in terms of timing across the timetable schedule.
That said, I do not know if any improvements can be made to the timetable schedule to mitigate against shorter delays although; I would suspect that longer delays are a different situation altogether.
I think the new Brittany Ferries service on the "MV Kerry" which is expected to commence ex-Rosslare to Bilbao will NOT be permitting any "Foot Passengers" as the vessel used is primarily aimed at Freight & Car Passengers only. From what I understand they will effectively have X 2 arrivals from Bilbao, Spain & 2 departures from Rosslare per week starting on 28th February AND the same ship will also do one arrival from Roscoff, France & one mid-week departure from Rosslare per week from March to October. Therefore, these new Brittany Ferries sailings into Rosslare will not have any passengers who will require Rail/Bus transport as they disembark from Brittany Ferries "MV Kerry" vessel. Not sure if "Foot Passengers" are permitted on all or any of the other ferry services using Rosslare Europort these days?
Irish Ferries has it's: Rosslare to Pembroke Dock route to South Wales
Stena Line has it's: Rosslare to Fishguard route to South Wales
Stena Line has it's Rosslare to Cherbourg route to Normandy, France
Brittany Ferries will have it's new Rosslare to Roscoff route to Brittany, France (during mid-week)
Brittany Ferries will have it's new Rosslare to Bilbao route to Northern Spain
(Neptune Lines services ex-Rosslare are aimed at transporting cargo)