Jessi's face has some problems at first glance (and first renders) such as the alien forehead (which you seemed to fix easily enough lol) and sunken cheeks.  Her jaw is very angular, almost pointy and the lips are massive.   All are easily fixed outside the face room with scaling, and dials.   Her eyes can also seem "beady".   There arent a slew of textures for her, and her default is actually rather dark.

Here's a list how to fix the jessi problems that I've found:

Upper-arm  shoulder issue:  Select each shoulder and upper arm, turn down the FBM dial and turn up the scale.  You'd be suprized you can take those massive muscles out quickly.

Egghead:  Easy, Scale.  Smush it flatter a little, and a bit wider, makes a world of difference.

Dark (sometimes TOO dark ) body texture:  Go into materials and simply add an ambiance in a dark grey, gives a beautiful ethereal pale.

Flat default eyecolor:  Again, a slight ambiance lightens them up.

Again I agree Jessi has her limitations, but i've found her body incredible for fantasy/strong women pieces.