hi !
i don't think the problem you find is in the neck/torso.
i think the problem is in the legs , they go down to the right instead of to the left, so when you put the head backward the subject seems to fall backward and when you put the head forward the subject seems to be bend forward. so no matter what you do, something seems wrong.

hope this can help you.

The solution is simple: don't draw from that angle.

I'm not being facetious; that's exactly my philosophy. I have extraordinary difficulty with that view myself, so I almost never use it.  The fact is, there are so many more interesting poses to use that I don't find much use for it.

I'm still trying to master this angle, because it will better inform my other work.  (So unfortunately I don't have any better advice.)

Hello Muscle Growth Nut:
Here's my 2 cents on this:

(Basically I just drew a drawing next to yours and saved various stages.  Now I try to sort out my process in an organized fashion.)

1. I figure out the ground plane and where the head is.  Then drop a line from the back of the head to the ground.  This is where the spine will be, and the main mass of the body.

2. I put in a 'S' line for the spine.  Then attach ribcage and pelvis.  Also, noting other peoples' comments on foot placement on this thread, I have adjusted the line for her leg to be at an angle going back.

3.  I draw in the leg- it's got an 'S' shape too, with the front of the thigh bulging forward, and back of the calf bulging backward.  The foot is usually directly under the head (whichever foot is load bearing that is)  I draw in the shape of the front of the torso- sort of an arch from groin out to the rib cage and back to the base of the neck.

4.  I draw in the breasts, and the arm.  I have put her arm back so that none of the side of her figure is obscured for this example.

5. Add surface detail, and I gave her a bigger foot to try and balance her.

Regarding neck and torso- what I see is that you don't indicate the top plane of the shoulder so the top of the arm looks like it is attached to the neck, and that the neck is a bit too long and her head is set too far back- generally the back of the neck and the back of the head are in the same vertical line, and the front of the face juts out past the front of the neck.  the top of the shoulder problem can be solved by drawing a line showing the top of her trapezius and shoulder so that it looks like they are in front of the neck.

And I'm done blowharding!  Hope any of that proves helpful!

You are the man Jed!