The stations in my DRL. Bolded stations are where there should be express service. If you improve service on RH GO, the express thingey doesn't even need to be considered.
Seneca, Finch East, Peanut North, South Peanut, Don Mills-Sheppard, Havenbrook, Duncan Mill, York Mills, Lawrence East, Green Belt, Don Mills-Eglinton, Flemingdon Park, Thorncliffe Park, Pape, Gerrard (East Chinatown,) Queen (Leslieville,) West Don Lands, Corktown, St. Lawrence Market, Union.
But express service could just as easily be provided by Richmond Hill Go. I figure that you could make RH GO real regional rail and leave out building express tunnels. I don't think the DRL shouldn't be built solely with relief in mind, but to improve network connectivity and local service as well. This DRL would be able to provide both local and regional trips, while providing a significantly faster trip for people taking it, while staying a very good option for people from the east.
EDIT: I honestly don't know why a stop wouldn't be put at Thorncliffe Park. There are thousands of people living there, and there are a number of jobs in the area. I don't think there could be a more logical place to stop.