I disagree. I think the big daddy has enough contrast. The brightest highlight used has a luminance of 92% (lab) and assuming that the mech is made of some matt instead of some ultra-shiny material I don't think it really needs shiny highlights. The darkest tones are a bit bright, but this depends on the scene. If it's supposed to be put in a neutral scene it would look strange but in an only slightly dizzy scene this would work I guess.