The same Mesa that has two extra inches in Y, 2 more in J, plus wider seats vs the 319, 767 should be OK but business people especially in J will likely be avoiding premium rouge.

Of coarse time will tell if it will stay, routes come and go, but rouge YVR-LAX is fairly new as well (couple months now), and with limited competition. There hasn't been a full quarter of business yet so its doubtful full financials have been done, plus real test comes once the American carriers start flying the route as well.

Lots of capacity coming, winners should be people of YVR.