The nudity is only mentioned on the grid. The consumer warning reads as follows: "Mild violence and themes, Online interactivity." No mention of nudity there. It also never says "very mild nudity,' it says the nudity has a "very mild impact." Which sounds more like a rating given to a game with no real nudity, just suggestive tight clothes. (I'm looking at you Falcon).
Reading too much into things, as is the curse of Smashboards. Also, Bayonetta never actually shows anything. She's just a tease, guys. There wouldn't be any nudity if she was playable.