why don't Scirra buy over this plugin an integrate it in C2 and build specific editor tools for it like they did with Spriter support?
Yeah, it would be a good direction to add to the next generation of Construct (C3?) and would help differentiate itself from C2. Hopefully enough people support this project and the devs can really turn it into something special. Then Scirra may see the viability of adding 3d support, or least support for this plugin.
I still have my doubts that the average C2 user will get a good handle on 3d, as it can get a lot more involved than 2d, and you do need to know at least some vector math and principles of 3d...normals, parent/child hierarchies, local vs world space etc. And that is before actually modelling , rigging, UVíng and texturing your assets.