1. CJS is not gather dust. It's the most activly used C2 mobile wrapper right now.
2. The individual who made the comment mostly hangs out in the Ejecta thread which has a descent following. If your doing IOS you are probably better using that.
3. have you followed the tutorials on using CJS?
4 How are you testing your program out. by cloud compiled version or launcher.
A. if launcher are you using preview over lan with CJS?
B. if launcher are you copying the .zip file over the root of your android device?
CLAY.IO is not the same as CJS. Clay.io is not a wrapper it's an achievment and online cloud data storage.
XDK doesn't support accelerated Canvas. It's built to make DOM Web Apps faster.
Also to catch ahead. Game Closure has an overhead that no one has simplified yet for ease of use. So it's not a running option until someone does so(which I seemed to be backed in to a corner soon to use)