The new terminal is much better as a traveller, but I can understand that it doesn't do much in terms of family members coming to wave people off.
However, it's not as though there's that much in terms of refreshment places airside and the retail offering is very poor compared to similar sized airports internationally. It's pretty much the same old shop, but just a bit bigger and now you're forced to walk through it. Possibly they could do with getting in some retail consultants to consider how to improve the retail offering.
And if they're looking for extra revenue, how about opening the Jack Lynch lounge earlier. Currently, it opens at 6am, completely missing the passengers on the 06:20 to Amsterdam. After the 07:25 to Heathrow and the 16:00 to Heathrow, this flight has more Gold Circle passengers than any other during the day. They'd get to charge Aer Lingus €20 per passenger for people who are only going to come in to grab a pastry and a coffee at that hour.
All that said, how much of the lost revenue is hitting the airport itself and how much is it a problem for HMSHost?