I can't see the crotch grabber in action in any of the photos, and thinking about it they usually photograph figures without them fo aesthetic reasons.
A crotch grabber for Rain would deform the baggy jeans, so I think they may have gone for a waist grabber as they did with her original showing:
In the Secret Base display the waist grabber looks to have the added bonus of making her shirt drape more loosely, so it's not clinging as tightly as in the promo pictures:
Another option would be to partly tuck the shirt in to create volume:
This picture is really the worst this piece could possibly look to me. Her neck is gone, she's drowning in that shirt. The lighting isn't doing her any favors, those shadows are just brutal. But when you compare this with some of the other photos, you know it's not as bad as it looks.
If this was the first picture I ever saw of this piece, I'd be excited. Almost as excited as I was when I first saw it at Tokyo Comic Con.
That wristband really should've been adjusted though. Can't even see her watch.
The shadow from her hair makes her look like Ahmanet from The Mummy to me.