Here is the latest version of my proposed beltline subway for Toronto - Same idea; new graphic
This version shows existing subway lines, new lines and extensions and new extensions in progress, and my proposed new lines
NOTE: I am not taking credit for most of my proposed new lines; most are obvious or have already been proposed by others
Your proposals don't appear to provide that because they would eat up massive amounts of capital dollars while simultaneously ballooning operating costs.
On the other hand...a friend of mine mentioned being shown a 3 bedroom penthouse condo overlooking STC that was selling at around $400,000.
I would hate to give up Credit Woodlands though...and my proximity to the lake...but at the same time seeing where Sq1/MCC is now suggests some hope for STC in 10-15 years.
But then I think of the Big Dig and what happened to Big Bertha and I shudder to think of what living through that will be like.