To me constructive means there is a suggestion of how to improve.
But like some of the other comments have mentioned, it's not a general purpose tool... it's more like he open-sourced his dot files.
You can certainly make a few things work, but it would be nice to see a community of interested individuals come together to flesh out the abstractions, make sure everything is documented and works as advertised. As it is now, the class hierarchy is a little... misshapen. It's not clear what classes are responsible for what functionality, and how everything fits together in a nice, orthogonal way.