This is an area that I have found where there is a simply, a significant gap.
Every US major carrier does it, for every fare class, even mileage tickets. You can even change transborder tickets, tickets to Mexico, as well as the Caribbean.
WestJet does it for Golds, even if there are teething issues with the new benefit.
The only place where free standby is offered for elites is on the triangle routes. And that's only to move flights earlier; you cannot move them later like all the other programs.
Alaska Air does it for all passengers and their dog on
every shuttle market.
Why can Air Canada not provide a basic service for elites that every other airline has?
And no, don't tell me to buy a Latitude ticket, because no other carrier is asking for the same thing. Do they simply not have the IT? The trained agents?