I believe that the TTC put the kibosh on the idea because there is only so much political capital and the winds were not blowing the direction of "more tracks in mixed ROW"IIRC the turn radius was too tight so the TTC abandoned the idea.
The TTC also wants a pair of tracks up Jones from Queen to Gerrard for flexibility looping cars, but this died on the same altar.
As I posted earlier; I wish the city had Councillors who would fearlessly make the decisions required to improve the place. Not everything is easy. You were elected to lead. Leadership involves unpopular decisions. Every parent knows that. I can't stand these people running for the corners, and making due. I also can't stand half-assed.
For what it's worth; and Kathleen Wynne is still a controversial figure, Mrs Wynne was not afraid to state what she thought needed to be done and make the case as she saw it for getting it done. Regardless of whether one votes blue, red or orange and esteems one of those parties, this quality is rare and we don't have remotely enough city councillors - large council or small council - who embody it.