My understanding is that the staff has changed quite a bit since the original deal was being worked out in 2013, alot of the newer management seem to prefer sustainable growth rather than Ryanair growth, this is evident by the new CEO securing Lufthansa and SAS when others couldn't.
And in regards to government and regional development, it'll never happen. In order to spend money you need money, and the Irish public expect all these infastructures and schemes to just appear without paying for it, so no political party will go for it.
In regards to Shannon, Berlin is a bad loss, I understand that it was a very good route for Ryanair with good onboard sales and yield in general. Pity to see it go.