The rate of growth in areas such as China is astronomical. China is developing faster than many people realise and this middle class transformation means that more kids are going to be able to play football, talented kids will be trained and groomed for professional football, top quality facilities and coaches will be abundant etc etc. The list goes on.
Re China:
Yes, the rate of growth is incredible, but their grassroots football is practically non-existent. There is no Saturday football, no junior club system. The success of Guangzhou Evergrande in the AFC, and the increase of the profile of the Chinese Super League (since they moved to deal with corruption), has meant that football in China is in a much better space. However, until organised grassroots football improves, I don't think we'll see the same dramatic improvements in their national side. They are still drawing on a relatively small pool of professional players.
The problem with grassroots football, especially at a junior level, is that people don't have time to play and train, kids especially. Until the whole education system is restructured (a whole other subject), I just can't see this changing quickly.
Another issue is that with the increased profile of the CSL, and especially with all the money in Chinese football right now, there isn't a whole lot of reasons for local players to look at overseas moves - and I think this will slow down the development of the very best players.
Re moving to Asia generally:
I'm all for it. Whether OFC is absorbed into Asia or whether the best Oceania team enters into Asia's qualification process at some point, more regular football against better quality opposition is only good for us I believe.