Very interesting information about the transfers. But anecdotal evidence is enough for me to show that 2 decades of tri-level transfers at Kennedy is a bad idea. The idea of doing this again at Don Mills is crazy and lazy.
But back to the topic of Spadina north of York, I agree with the comments made about 407 transit-way station. Surely we have learned from the stations along the Allen or from other jurisdictions where commuter rail is connected with a highway. It alienates riders and makes it difficult for passangers to access the station-stop.
With the exception of the VCC station (which planners in Vaughan/York Region/VIVA had extensive literature to support), there does not seem to be a mention of Transit Oriented Development (TOD) in this plan. I think this is a huge mistake, one that will forever dog the success of the extension. Development and transit need to be coordinated with each other, and the 407 station flies directly in the face of this core principle. Another core principle is creating attractive, save, and accessible stations. A station atop a highway fails to meet even a fraction of this requirement.