I dunno, I feel as though Yonge Station (Bloor Line) could really use a second platform like what has been done at Union. Those existing platforms are dangerously narrow to be handling such crowds.
You do realize that the STC and Vaughan extensions are relief lines in their own right, right? The Spadina is intercepting passengers heading downtown from the west end prior to them reaching Yonge and likewise the north-soutth arm of the Danforth Line intercepts passengers from the east. Those passengers if met by the Phase 1 DRL at Pape, would be bypassing Bloor-Yonge - thus alleviating it.
This mentality that all other transit projects must stop indefinitely and use their prioritized funding to fund the DRL, rather than source it's own new funding, is precisely why there's no much anger and division in this city.