your understanding of anatomy is growing and it shows!! You should feel good about that. Remember that its okay to have an underdrawing. If you look at some of the old masters you can see the foundation blocks ( or cylinders) under thier drawings. Understanding how to do this combined with an understanding of anatomy will allow you to put characters in any pose you want with little or no reference. That is the goal. To be able to draw without the ref if you need to. Sorry i haven't been responding much. I've been up to my eyeballs storyboarding a horror movie. I'll be able to post some selected scenes soon. Keep up the good work!
"The artist is nothing without the gift, but the gift is nothing without work."