Well as mentioning that GC is difficult to use for the target C2 audiance. The benefit is that GC is open source.
In theory Scirra could setup a online service like Ludie and do the work by submitting. Another option is with some fiddling they could create a wrapper similar to Ludie CocoonJS launcher. Though That could take some more work. There are options.
But as Scirra is a 3 man team and I suspect only 1 or 2 of them are the C2 developers. I don't think it would be quick undertaking. Maybe whent here staff increases.
However I feel extremly that if Scirra could get very solid mobile exporting going. I very feel that would increase sales by a good jump.
While the desktop is the primary support for C2. There is a steady growing desire for mobile, but more importantly true crossplatform. This isn't a debate of crossplatform of desktop computers aka Win,Lin,OSX, it's about platform devices. Desktop, tablet, phone.
Games like GTA3, KOTOR, Baldurs Gate made it to IOS devices, but more importantly the new X-Com game is now on the iPad. The shift is coming and Scirra should take the benefit and offer true cross platform support. While the tech is there, the bridge is not there yet.
But I suppose it will be what Ludie does next. When there next release is. If problems continue to persist maybe it's time to really move elsewhere. and I certainly believe that at the moment GC is the best alternative. It's too bad that they for some strange reason believe that WebGL is not worth the effort. Considering that performance would be better and offer access to so many more features.