I can say that as someone who is 5'9-5'10 my knees were jammed into the seat in front of me, YYC-LAX. Again for me it was a bit uncomfortable, I had 1 drink and that made it nicer, on a short flight it was bearable. Not ideal though. Still interested in checking out a rouge 767 to at least sit in/try out the seats.
I totally agree with them Rouging YYZ-SJO though. As a former employee, I can tell you the A319s were oversold almost daily. It was nearly impossible to go standby. Would it have made sense for a 767? I guess not because they never bothered to do it. I would think that with the cost to run Rouge flights they can afford to have some empty seats where they may not be able to on mainline.