You're in T2.

The Aspire T2 lounge is not very big (though the ceilings are high and the window is big). The food is very ordinary (pastries, soda bread, packaged snacks etc) for breakfast. The only hot item is porridge (so, no meat/potatoes/eggs). There's some beer and liquors. There is 1 shower available. No wait when I was there on a Monday morning, which was convenient. By all means, swing by. Just don't have your hopes up too much.

Does your family have global entry? I think it's more than safe to hang out in the lounge until 2 hours prior to boarding to go to pre-clearance, even without global entry. The Dublin Airport page has statuses for each flight, including when to go to US Preclearance.