Reverting back to what? looks good to me. I would say though that you depend pretty heavily on your guide lines, and the poses are lacking free flow, which makes the poses feel a bit rigid. You have a pretty good foundation for anatomy id say, it may be time to start weaning yourself off guide lines just a little. maybe only use them in areas you really have trouble with. Also, you may want to start looking at some refs of muscle anatomy now, instead of the basic structure anatomy. good stuff, keep it coming.