Yes, the YWG-YYZ service was always geared towards feeding into YYZ connections in the AM, flying people back to YWG in the late evening. We used to have 530, 630, and then 730 AM (or thereabouts) departures. Meant that YWG was not well served if you wanted a mid-day flight out.
Right now with no late evening flight back I have to take a WS flight to connect from in inbound. Unless they too are cancelling things on short notice.
Hopefully August and September will see at least three flights per day.