Update : I linked to an imaged of a Yamato VMF50 Type D earlier, and that link didn't work, so I have updated my picture with the Type D for comparison and a rear view of my own girl.

The larger bust is a huge improvement over the default, and without the modified abdomen, I think it might actually overpower the thin default abdomen. It's not quite a VMF50 from Yamato, but she's definitely got something.
The thighs on the 50cm are actually much better sculpted than I anticipated, they have some real shape to them. Personally, I find the additional curves of the large bust and 60cm abdomen balance nicely, and compare favorably to the Yamato body set, it's most definitely an improvement over the original - IMHO.