[WIP] Zbrush Ecorche Sculpt Critique. All feedback is much appreciated

Hi guys. Im doing an ecorche study as practice to learn anatomy. This will hopefully a portfolio piece that I will texture and render in arnold. For now im still blocking in the the torso atm. If you have any critique at all that will be greatly appreciated. I'm really looking to push the quality of this study. I struggled with the skull a bit. Also trying to find a good way to measure proportions.