The last row especially the window side is more private. You can clearly see what's going on in the entire cabin, and no one will be starting at you from your back. (Nothing creepy it's just people become too tired to watch movies or do anything but can't fall asleep in the weird slanted seat)

I won't worry about legroom unless you are really tall because the seat pitch is great on CX. A quick search shows it's 45in, compare to 36-37 on AA Domestic F