For China is was the best option to go for the J10. It does not need the quantity aspect desperately cause we all know the numbers now and the numbers in the future. Neither will it desperately need inhouse medium tech plane against a bigger enemy... It needs high tech asap, hence J10 and J11 developments first. For Pakistan the JF17 brings a reliable, inhouse fighterjet with decent capabilities and a path to grow (TOT and further to exports). For many other customers it is the same wish to be less reliable. This JF17 offers that. Which plane (even second hand) does offer BVR, HMS, IFR, Digital cockpit, simple maintenance, cheap spare parts, no political strings etc etc... If all others can afford to buy a better J10 or J11... They should get that. But there is a big difference between high low mix that is the way of doing it. Do we need J10 capabilities in big numbers? I don't think so. Does the J10 present a real market outside China (or Pakistan)? I don't believe that the numbers are comparable. Will China offer their best planes to everyone? Sounds wrong to me.
So, I think there is a bigger market for JF17 and I believe that China has other needs at the moment. Knowing that everyone can predict that if JF17 will have full China parts and improvements then there will be a moment that a large part of the outdated planes will be replaced by it. While China has L15 as an option... You see large number og K8's and even Mig21-derivative seen as a decent option. I think that the next edition of JF17 will be a valuable asset for China and will be inducted from 2015...