I'm not sure I understand your point but, just incase, need I mention the shiney new air defence zone China has.
When I read the "Blaze" article, my first thought was, "Well, hell, if we renege on this, what kind of message does that send to an already over-caffeinated China about our treaty obligations to Japan? Or even South Korea?"
How excited will countries in the future be about accepting our word that we'll protect them?