What is the best strategy to port game that uses cocos2dx 2.0.x to windows8?

Our company tries to port simple game written for iOS/Android to WIn8 and we found many differences in Cocos API. That’s because Windows8 branch is based on older version of Cocos itself, IIUC.

What is the best strategy to deal with this situation? Backport our game to older version of framework for all platform, or just make sure we can build/run on Windows8 with all required changes? Maybe we can help to core devs to port win8 branch to more recent API (2.0.x?)

What do you recommend?