Well, EK loses a lot of money whereas CX is profitable. Clarke is in the enviable position of being able to add destinations with the main concern to increase top line as opposed to increase bottom line. (It helps when you have sovereign money behind you.)

I think CX would do well with a Mexico City flight. I know a lot of people in China flying there and forced to transit Tokyo since can't transit LA without a US Transit Visa which is just as difficult to obtain as a standard visa for mainlanders.