Not for nothing but AC YVR-MEX lands at like 2340 and it's pretty full for good portions of the year. There's times where it's absolutely dead, but not that often. They have more connections, especially recently with Avianca, but it's mostly O/D still. I do agree they should link up with AM, a red eye out of YYC would probably work nicely, but AM did it before and stopped for whatever reason so presumably either they CAN'T...or for some odd reason, didn't want to. IMO like a 6am (ish) arrival into MEX and turning back out at 0730 to YYC would've been ideal, but there's gotta be a reason.