Wow, there is much more A330 action than I knew! I do sometimes wonder about the Air Transat and Edelweiss flights though, if they are for real or just a myth.

I have never seen either airline at YVR. They must be flying on some odd hours or departing from some strange gates, as I am always on a lookout for some new plane tails and still have never seen one.
I think you guys worry too much about the premium seats. Almost none of us enjoys the luxury of flying Business, not to mention First frequently, so why does it matter so much? I doubt YVR's success depends on the number of premium seats and if the airlines see better investment in lower product, who are we to judge them? They are choosing to fly the product that is most profitable for them. I doubt the demand for premium seats depends on their availability, but the opposite is true and an important factor.
Anyways, just my 2c. Like said, I like seeing different planes and airlines, so more the mix, the better. Also, Economy Class has normally more leg room on other plane types than 777 or 787, so it is good to have those planes as an option as well. Or maybe it is just the case with Air Canada, perhaps.