OG and PandaPerth thank you for your insight about the Circle Pacific product.
The attraction of the Circle Pacific was the very attractive price in F and J from some points ex Asia (combined with the very strong Australian dollar).
But you are right it is a restrictive fare. The 29,000 kilometreage is actually quite low when you combine South America, North America and the two trans-Pacific flights.
So I will end up with the Oneworld Explorer ticket. I agree is a very flexible fare and worth the additional cost.