Just a few points that come to mind:
Positive, you mentioned that there is provision for an extension of the current 10/28; although there's no interest in doing that by the DAA (they'll need to be told to do so), does the fact that it's included in the "plan" mean that the planning process will be quicker, i.e. no EIS? (The likelihood is, of course, that 10/28 will remain at its current length despite the need for new long haul flights/cargo routes.)
The Fingal CC plan provides for a new terminal complex between what will be the two runways; however, current plans call for the Metro to serve the "old" (i.e. current) complex. Hopefully, someone will be done in due course to make sure this happens.
The one thing that the DAA/govt should have learned from the current debacle is that planning needs to be initiated a long time in advance; that the new T2 was revealed as insufficient SIX MONTHS after completion is unacceptable. However, what action has been taken to initiate the tendering process? None, as far as I can see.