Perhaps this particular armor is meant for combat situations where the wearer takes cover behind objects and peeks out to fire. The wearer's lower body would rarely be exposed to the enemy's line of fire. Moving from one piece of cover to the next swifty would be easier to do without hindering armor pieces (and weight) from the hip down. Thus the heavy protection up top and lighter protection on the bottom. And the skin? well, maybe it's hot.. ventilation is good.
Blimey charlie, her backside has my undivided attention. Charlie Mike, squad leader! However, I still appreciate the snapshot in time this picture represents.
I'm also surprised at the hostility and vulgarity over this artwork, as if it were a proof of concept armor set for Future Warrior with billions of dollars at stake. It's science FICTION, and likely a contractual obligation.
I'm sure it's instruction you received from higher ups, but functionality wise and design wise this is really bad. I'll be honest that this actually made me lose some interest in the project. I know this direction is out of your control, though.