I was surprised to learn that there is a decent sized double track section around Carrigtwohill - I thought it was full single with a double track terminus. The terminal section could be extended west (there seems to be room for a second river bridge deck) but am not sure about the overpass west of that and would much rather spend cash to knock out the two small LCs a bit further on with a single decent overpass.
As for “Ballynoe” - where would that be in actuality? If it was beside Carrigaloe ferry dock there would be an intermodal aspect there at least.
No Tivoli is a crazy call - a golden opportunity to create dense and transit oriented development hindered surely?