Honestly, this form is easier to move in, so this is usually how I look.

Well, she breasts feels heavy, so it can't be helped.

In this version, she wobbles far too much when walking. :p

The difference in breast movement turned out to be whether I was using 3-point tracking or full-body tracking. With full tracking, the boobs sways much more boldly.
On top of that, after tweaking various settings, the motion became even more dynamic—so in the end, it actually worked out really well.

BE Walk 2-b