As much as I love cocos2dx, now I am at the GDC and I have to say it puts me down that I can not see any mentions on cocos2dx. to be more precise, from hundreds of vendors who provide some kind of integrations with a game engine, non even was aware of cocos2dx.
I think cocos2dx has its own unique qualities. but seems that the owners need to push the community to had features to it. I have created tons of widgets and stuff that are not part of the original cocos2dx but I heard that it super complicated to contribute to the project so I am not even trying to make my components for a “production” style.
Just my two cents.