Yes we know that feeder routes are extremely important for subway ridership in our city. However, why wouldn't you prefer a subway to be directly under a more urban street with walkability and high density? You would still get the feeder routes going into it, why not also make it more convenient and closer to people's origins & destinations?
My other argument is this, although it applies mainly south of Bloor.
A. University and Yonge are simply too close together and it would have been better for transit access to move it further to either Spadina or Bathurst.
B. This is not a well researched argument, but anecdotally in my life and the people I know, I find that many destinations for transit downtown are near Spadina and Bathurst. Many workplaces are located along those streets, as well as restaurants, and when visiting people, I just find that west of Spadina is a very high percentage of transit destinations. I feel that having a subway on Spadina & Yonge or Bathurst & Yonge would've put more common destinations within a shorter walk than the current University & Yonge.
Anyways it's kind of funny that we're discussing this given that this subway opened 50 years ago