Considering the focus is on the defence, Robbie McDaid had a good year with Boden and UCD. Former captain at Minor. Played FB with U21's. Surely worth an inclusion in the squad?
However I don't believe this will be a problem the further we progress. The teams in the early rounds don't possess enough skilled footballers, so often they resort to long balls and this may have caught the lads off guard.
Look at the defence (Philly, Jonny, James, Cian, Small, David Byrne, Fitzsimons, Daly) have tons of big game experience and I wouldn't doubt them being able to improve especially later in the year.