I don't think "out of gamut and posterized" constitutes lo-mo photography. I think it's representative of poor post processing technique IMO. I've seen a lot of B-Movies, but I've never seen out of gamut colors, or posterization intentionally used as a cinematic device. I think there are other ways to accomplish what you're going for. I'd associate that style more with slight saturation of colors, and a flatness to the blacks a more "lo-mo" feel. Just because you up the saturation, doesn't mean that you should let the colors slide out of gamut. Especially in the hair. It makes her look like she's got a pink helmet on. I'm not trying to downplay your post processing, but I think you missed the mark on this one.
Furthermore, if you're asking for C&C, but the downsides that are pointed out in the photograph are "actually exactly what she wanted" why do you even ask for C&C? If the photos are perfect, why are we wasting our time pointing out certain things that you could do differently to improve the photographs? C & C = Comments and Critique, not comments and coddling. I see this a lot and personally I don't understand the logic.