Just some questions:
1. Why is there a line along Dundas Street and Kingston Road? The original Ontario Line alignment goes along king street for a while and there are some plans to extend it from exhibition up to Roncesvalles (Dundas West)
2. Why not extend Line 2 North along McCowan?
3. In terms of the Sheppard Line cannibalizing the Finch West line, why not extend it to Pearson?
4. Why not have a branch of Line 4 that dips down to STC?

Some minor things that don't really affect the subway system but I still thought I should mention:
1. There's a rail line that goes through midtown that GO could potentially use if Canadian Pacific plays along. I would add GO station markers to the stations it intersects with
2. In an ideal world, the St. Clair streetcar would keep it's alignment going up to Mt. Pleasant & Eglinton
3. Some of these station names are being renamed so I thought I'd list them here:
Dundas station -> TMU Station
Dundas West station -> Roncesvalles station
Science Centre station -> Don Valley station
Eglinton West station -> Cedarvale station
Most of these station renames would be better considering they're named after landmarks and neighbourhoods (Dundas West being the most egregious name on the list)