If the transfers were really reliable, unlike now where a single deay can make you wait for the next train an hour or more, it might work, but i think for now the focus should be on repairing the line and prepping it for electrification, then if service is restored, even many years down the line, it would be a simpler task. The rail that does remain looks ok, but it'd all need to be ripped up, ties too, so maybe they could do that. All the crossings would need concrete panels put in and so on. All of the bridges, cuts, and embankments would need to be inspected and any repairs or replacements would need doing. We also need new stations, signs, all the backend trip planner stuff, advertising, and of course all the signal conduits and whatnot would need to be spec'd out and then at the end you fit it all together and see how far you can get it without trains needing to run. Once there's that last push for trains to run, the fight over scheduling and headways and all that takes place. by this time silverliner 6 may be in planning stages, so perhaps an expansion order would need to be done.
Sadly, the one and only thing we here can really do is use our vote to get this accomplished on election days. Petitions only go so far in such a divided political atmosphere.
Next stop the square, journal square station next!