On a more detailed look, the LUAS capacity enhancement consists of delivering and commissioning the longer 55m trams for the Green line, which are extra modules to convert existing 45 metre trams. Also about 6 new "high-capacity" trams.
No mention of new LUAS routes. No mention of DART Underground, which if you are trying to radically enhance public transport capacity in the Dublin area, is what is needed - and that would be just the start of it!
Overall predictably pathetic from the DoT.