Yes, Andrew, that's exactly what I'm saying. I don't really care about Q-miles (especially with the new Aeroplan) and I will not be upgraded on the fares I buy, but I do care about being able to fly YOW-YWG without doubling the travel time by connecting through YYZ. I'd be quite happy if they switched both non-stop flights to Tango. I'm sure there are plenty of other like me, so switching only one flight defies logic.
Maybe AC could set up a mainline return ticket that allows passengers to book one segment on Tango, space permitting.