In the latest version of the timetable, AC has restored the evening mainline flight YOW-YWG by reducing the frequency of YWG-YVR. So I'm happy ... I don't have to use Tango for my domestic flights (yet).
Wonder if they will really be able to fill three 737 aircraft per day on this route (2 mainline, 1 Tango). Loads have been a bit thin lately with just the 2 aircraft except at peak travel times.