Quote - 1.  V4 Magnets.  She's loaded with magnets, which I am at a loss to figure out what they do.  I did discover that the breast movement dials are useless without them, but other than that, I'm not sure.  Are the magnets mostly for clothes fitting purposes?  I see no magnet set master control that is typical on magnet sets such as my Universal Magic Mags product.

The built-in deformers replace a number of joint-controlled morphs, and should, in theory, make her bend more realistically.  This also eliminates the need for matching JCMs in clothing items, since her deformers can directly affect the clothing itself.

Quote - 3.  Body Morphs body part.  It is the same as "Body" all the same dials are there.  Why did we need this?

I think it's the same technique as Anton's ADS control dials for Apollo Maximus, allowing you to save body-morph settings directly to a pose file.  Earlier versions of Poser couldn't save channels from BODY itself, though they'd save channels from other body parts.