Its classic politicians and crayons.
So how does the metro surface at Charlemont? Don't think anyone actually went out and took a look did they?
Maynooth line electrification is obvious quick project, would cut journey times and release a pile of 29k's for other routes i.e. Hazelhatch PPT. Won't deliver a huge amount in capacity really probably only get 2500 extra peak hour capacity.
Without DART underground you aren't going anywhere fast