Originally Posted by
CZAMFlyer
Perhaps the OP can speak for him or herself, but my interpretation was that the request was for the downsides of routing via YVR, not the downsides of using AC itself. Choosing AC was a given for those who read the opening sentence of this thread.
What I am trying to say is that, since AC J is mediocre, routing via YVR is a downside because of the added segment and flying time.