The blunt truth about "late to the gate" is that the airlines protect their first class pax and their loyalty program members first. If those people take up the empty seats, then pax without status booked in coach will be the last to be accommodated. I would have been relieved not to have spent the night in Vancouver. As Rick Steves says, "if you arrive at your destination the same day you thought you would, it's a good trip". Wish I had better news for you.
Likes: FrankL183 and Neil Maley