It looks like she has no bones. Like you're not considering skeletal anatomy. Since you mentioned the ribcage, why not model out a ribcage and actually put it inside the mesh? It's a great way to see how the underlying shapes of the bones affect the surface shapes of the figure.
I have put about 20 hours into this study over the last week, and I feel like I'm hitting a wall. I would greatly appreciate critique. Please, don't hold back. I am aiming for a healthy build with realistic proportions. Some specific areas that I think are giving me the most difficulty are the shoulder/upper arm, overall…
yea, i wouldn't say the sculpt looks like its ignoring skeletal anatomy. it might not look like the idea "cg girl" that you see most artists modeling, it does look like a more natural or real person. you nailed lot of the broad landmarks that most people miss. since this looks like it is an early stage, only thing i can…