Thank you for posting these photos. I'm shocked that Pearson is going for the cheap-out on this. This will do little to attract Americans/Other Intls to use Toronto on their way to Europe/Asia. Montreal is doing a better job of setting the passenger experience in particular with its new expansion. Its little surprise that YUL is attracting a larger share of the international traffic.
1) The vast, vast, vast majority of pax book on fare concerns. Beyond that they might consider the actual airline and onboard services. The gate lounges are pretty low on the list.
2) There's nothing restricting people from moving around the the terminal. They aren't confined to just those gates. I flew through these gates a few weeks ago. Went and got a bite to eat. And then went to the gate.