As I look at your gestures it does look like your improving, I think looking at 5 and 6 I'm seeing some nice curves around the midsection. I think though you could try to focus on having a little more line efficiency, meaning I can see you sketch over the same area a few times just to get a right when maybe planning and confidently using 1 stroke may help you get a little more clean lines. I'd also say that there's probably a good opportunity to focus on using more S and C curves vs straight lines in the limbs.