Well I'm not happy with the amount of problems that I spent using Coconjs, but if you think so, the crosswalk is also full of problems and still has no some essential features.
The crosswalk may be more promising in long term, but right now, I still do not migrate until actually offer similar performance and all the resources I have in Cocoonjs. Or at least be compatible with google play services.
(As for performance, already read some topics that they are similar, but I still face difficulties in optimizing my games on it)
I'm not necessarily defending or criticizing either of them, just let my opnion as a user interested in good results for my projects.