Perhaps competitive pressure. YYC is WestJet territory these days. AC has lost its dominant position and it needs to work harder to win over the minds and harts of the local traveling public.

A simple sign and two lines, one for zone 1/2 and the second for the economy cabin is refined and very much in keeping with the more dignified Delta and WestJet customer experience.

Having 5 different lines and everyone in individual zone lines is very United like and more representative of what you would expect on a cattle ranch.