This fix was done ages ago
Not all terminal stations and common starting points during engineering works were fitted with the CIE wifi units. This was addressed. When we noticed Rosslare wasn't fitted up a unit was installed. The trains can also get the reservations through the WiFi system also.
Given most of the issues reported are at 5pm on a Friday in Heuston this fix doesn't help.
We have had extremely technically detailed discussions with Irish Rail about this and have seen some improvements.