The loop around the front acts as a stand, and the upper body is stiff. Statue-style building, without full articulation, is sometimes the only way to make a structure. That's how Retinence made Arcanine stand on one leg, a far more impressive accomplishment than this.
You absolutely should. This MOC looks pretty awesome. it'd be nice to know what's going on with it. The sucky thing about Sculptures is we gotta represent a 3D art medium with a 2D medium. So that requires we take more photos and put on a good presentation of the MOC, otherwise what's the point? Why build an awesome MOC, then not do equally as good a job presenting it?