Dice//
Banned
Not having cloaking material out of ...well... a cloak is pure fan service. It's not necessary from a design perspective that it need be done in the nude.
Quoting you and sort of generalizing 'out there'.
I actually thought it was clever. When she didn't have the skin-colored body suit she went nude. Made some sense (ok, her eyes and her hair go invisible too somehow...but *wave it off*).
Problem is that the movie indeed sexualizes it; and a TON of shots of the Puppet Master take careful care to fit in a nipple shot or this shot (NSFW screens!). Despite the 'hard machine parts' under Mokoto's LITERAL breast plate, they still jiggle nicely.
All that said, I think the shot of Mokoto ripping the tank hatch (full nude and all) one of the greatest animated things I've ever seen --- it's so different and so cool, nudity and all.
It's definitely nuanced, but I'm not fully convinced in all of the 'artistic nudity' in this film as solely for the art of it all.