I think it's a bit smart to leave it out until the attention is on the next shiny thing and the prudes have moved on.

Is it bad to be prudish?

What's the upside of fully exposing the skin? I don't think skin exploration is the goal of this project, and this way they aren't alienating part of their audience.

I'm pretty sure Grey's Anatomy (the book, not the show!) doesn't draw clothing over the figures...