If that's true, then perhaps CX should open up more routes!

I can't imagine that there are many other oneworld carriers operating on midhaul/shorthaul sectors to/from Hong Kong, though - care to list a few?

Of the oneworld airlines, it appears that Air Berlin, American, Iberia and LAN don't even serve HKG, so the amount of overlap on longhaul routes can't be any greater than, say, BA experience at LHR.

I don't see where this supposed much greater level of route overlap can therefore arise.