Hipster Duck already mentioned the S-Bahn on stilts on the 401 (as for the one on the 407, is it actually along the rail corridor just north of Steeles?). There's more express rail on 400 series highways than there is in rail corridors. Someone going from Markham to Vaughan seems to be given a choice between LRT, BRT, and express rail, all running parallel. You mention that express metro lines are likely, but who honestly needs them with all that express rail? Why not just use those resources to build more metro lines?
The 401 line will be an engineering challenge, but a conversation I had with the official who proposed it left me with the feeling that the only issue would be the accessibility of stations.
Deep in the report, it talks about having station spacing of 500 - 700 metres for LRT, 1 - 2 km for metro and 4 - 6 km for express rail. You are right, they are a lot of parallel lines up in York, but they each have their own purpose and will attract a different kind of customer making different kinds of trips.
Metrolink thinks a subway is appropriate for Sheppard and Eglinton, but they also think that most of the people heading from end-to-end on a subway line should be using a faster mode. The city wants close station spacing, so the best compromise is short station spacing with express branches.
When the day is done, the only difference between express rail and metro will likely be the logo on the side of the train. It will be subway-style trains at subway-style frequency. Its best to think of express rail and metro as cousins, each serving a different market.
The Scarborough RT is kept, of course...even in a $100B plan we can't afford to lose crucial Ellesmere station! Replacing the RT with a subway extension and LRT branching out from STC would be cheaper and would help many times as many people. Since the Eglinton metro only goes to Kennedy - it should go farther east - maybe the RT will be extended along Eglinton (if memory serves me correctly, isn't that what AreBe proposed years back?)...if so, it seems Eglinton will get ICTS to justify keeping the RT. And if so, why not just say so? Why the ambiguity? There's been a few fantasy maps posted on this forum that are just as expansive as the Metrolinx options, but they're not at all ambiguous, whether it be about the technology, the routes, the stations, anything.
I think an RT along Kennedy is a great idea, as does a future web of RT lines in the east end. As for what Eglinton will be, it will ultimately be decided during the individual EA.
Right now, Metrolinx is being careful with its wording because if you are very precise, there won't be any flexibility and you risk being legally tied to the idea. If you are too vague, you won't have the teeth to back yourself up when things go wrong.
There's a Finch East line that curves north at Kennedy (or Warden?) and curves west again at what looks like Major Mack. It's just thrown on there, almost thoughtlessly. Will it be a limited stop bus route, or will it be a multi-billion dollar LRT line...why is it there? I'd support a humongous plan like this if only to ensure a few of the best bits get built, but the average person almost certainly would not support a transit overkill. They'll want to know exactly where these lines are going and what they'll cost, at least to within an order of magnitude. There's a few other random orange lines in the suburbs, like the one meandering NE of the 401/427 interchange. Instead of these random "connectors," why not build these orange transit lines on equally or more suitable roads like Kipling, Lawrence, Wilson, Bathurst, Dufferin, Warden, etc.?
That finch east line merges into VIVA Green, which should be bursting at the seams when Markham Centre is occupied. Since BRT and LRT is under the same category, it may be one continuous line or it may be three or four distinct lines. The individual EA will decide. The line going from the Airport towards York U is part of the GO BRT, which was included in MoveOntario2020. None of them are really random - they are just unlabeled because all routings are tentative.
The red lines are all great (the ones in rail corridors, anyway), and so are the white ones (minus the RT...but the drl should be *the* DRL, and extended NE and NW while we're spending this much), but the orange lines are hit or miss (partially because the map makes them so mysterious).
I have a feeling that the idea with the DRL is to turn it into a branch of the Bloor-Danforth line, which every second train running Kipling to Kennedy via Downtown (or some such thing).
Oh, and I also noticed a RedRocket191's house express route
I had nothing to do with this, I swear!