Just on that topic, the letting out of the bulk of the old Ferry Terminal building won't effect the return (or not) of a Ferry. The ground floor end of the terminal (down by Berth 5) isn't included and is set aside for Marine use with access to Berth 4 or 5. In fairness, it's a good idea in any circumstance to make use of the terminal building and it's frontage.
Valuable bit of real estate down there with a beautiful aspect - personally I think it would make a nice Hotel and performance space. Good to see that the Harbour Company are now actively engaging with Dublin Port, Visit Dublin and all the other stakeholders about working together on the cruise business. Makes a lot of sense for everyone.