I was personally told by someone very senior at the TTC that 2018 was the year the TTC even aimed to get ground broken on the DRL. That would have put it into the 15 year range. Instead we get York Region (again) getting the lion's share of the money, along with Transfer City. The only surprise was the express rail to Brampton in the 15 year plan, but my guess is that, even though it is nice to see, this is in there as a sop to Brampton, who otherwise wouldn't do well at all under the plan, and perhaps as a joint project with Blue 22, to have both the express trains, plus frequent regional rail, to appease Weston.
Mississauga doesn't even get much new either, besides some Milton improvements, plus the Lakeshore line, which was expected. The 25 year plan, if it ever happens, shouldn't stop that express rail to Cooksville, it should go into MCC, and there's a good case for it to go to Streetsville, or even Meadowvale (near major employment lands) as well.
I really wonder what the purpose of the GTTA/Metrolinx is besides a glorified clearing house sometimes, despite a lofty start and decent public consultations (and a horrible name).