This premise (that the US FF program members "steal" the CX premium awards) is a fiction. If CX didnt want the revenue it gets from its relationship with AA, it could change or end it, but it doesn't. The award redemptions are but one part of a larger deal, one that incidentally incents people like me to fly CX on paid business.

Why do I say this is a myth? For several months a few years ago, I commuted between the US and London and ran up a couple million miles on BA. For several years I have taken my family of 5 to Asia in CX business class each year on account of that balance of Avios I had run up. And it was like shooting fish in a barrel to get exactly the flights I wanted for all 5 of us in J. That's because BA (like CX) can actually book the awards a couple of weeks in advance of AA. This year, for the first time, I am booking with AA miles and it's a bit more of a scrum by the time the AA booking window opens. But the reality is that all of the CX FF members who wanted to book had weeks to grab the seats.... and guess what... they didn't! So either the CX members don't have adequate miles or they don't want the seats. The notion that AA members are a scourge that interfere with your ability to redeem in premium cabins is silly, I sense here it's more that just not liking that these AA people have the miles to book awards on "your" airline. That AA awards are cheaper is true, I think it is also true that the average American has a higher FF account balance (and much more opportunity to run up a few hundred thousand miles per year) than people in Asia do. The ratcheting up of award levels at AA will change dynamic a bit, but don't hold your breath folks, there are still plenty of AA flyers who will generate (and/or buy) enough miles to continue to redeem CX premium awards even at the new AA levels.