Crisiss the Athens and Valiant are the in fact canon designs. They come out of the graphical novels. The Athens (while not the canon name because there is none for the class) come from the grafical novel version of Halo: The fall of Reach. The Valiant (the canon name of the class) comes from the graphical version of the Impossible life and death of Preston J. Cole.
Oh, never read the graphical novel or that Cole book. Are they any good/worth getting/reading? Anyways, the fact remains that more creative designs are prevalent in the mod. If one thing irks me about this mod it's having a regular CCS and then a CRS floating right next to it that is 1/8th of it's size.