Stay with V4 and work on her mesh? Overall, she's got a lot of promise, but there's a lot that can be improved. However, it would take rigging knowledge, which I don't have. Meshing, I only have a bit of, though I've learned a lot from this thread on poles and loops, which I think play a major role in how mesh deforms.

I know that Daz wouldn't shoot itself in the other foot by making Daz-only figures. The Poser market is not inconsequential.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks