That would be some epic trolling. After a century, the solution would be to make people around 3 Avenue walk/bus to Grand Concourse, then take the roundabout trip crosstown to St. Nicholas Avenue (8 Avenue) and back again to 2 Avenue. Moreover, because there is no Phase 3, the train just veers off course right back to the west side of Manhattan (7 Avenue) before veering east again along Broadway.
“There is your solution, folks! Take it or leave it. There’s no more incentive to build the real thing now.”