Aphrodite I know cocoonjs is full of problems, but you seem to have a personal feud with them XD
I just dislike (like a lot) when bad or unstable solutions are used without thinking about the future, and the fact cocoonJS lacks of communication, organisation and support is a well known fact, it is not done to be C2 compatible, so there is no reason for scirra to show it or even propose it as a potential exporter.
And in this case, the box2D web physic engine was kind of nerfed in its functionnalities partially because of the physic engine of cocoonJS.
I will agree that I have a lot of personnal satisfaction with it being deprecated, however if one day it becomes stable, with a clear path, and good communication, then I could go back in my judgement (PS: I know the people behind it are not just wrong people, they have problems and I understand that, but the product just does not cut it for me.)