Northern Light
Superstar
I think most of what you say makes sense, but Gardiner east of Jarvis is low utility and a waste of money? You mean the section whose primary purpose is to connect to the DVP, a highway that feeds off into North York as well as the 401 and 404, serving a large chunk of North York, Northern Scarborough, and Eastern York Region? Also the highway is used by 401 East and 404 GO busses, and if the intercity busses move to Union, they will most likely use it as well.
Gardiner East is extremely useful and important, no less than any other section of the Gardiner. "Low Utility" is the last thing I'd describe it.
The bulk of traffic to/from the DVP uses the Richmond/Adelaide/Eastern ramp system.