We reviewed all the submissions. There is no feasible way to possibly show each part's feature history for an assembly in a single image. Further the feature history in an assembly is only visible while in part editing mode which puts other parts in a lower visibility state.
So, in short, even if it were possible and also wouldn't make bad pictures, it still isn't necessary. This is a modeling contest, not a design process contest. Perhaps in the future we could make design process challenges, e.g. create a specific part in the fewest features or something like that.