The face looks a lot better!
I think it's a bit off that there are outlines on the shorts and shoes, but not the shirt. The outline-less parts look better, in my opinion. If they outlines are meant to represent shadows, you should do more with them, it's extremely rare for a shadow to be a uniformly thick line along the edge. Give them thickness and shape, and don't be afraid to have some outline-less bits even in the shadow.
The thin-line shadows on the knees make him look like he's got skin or fat flaps. On skinny people, the knees are knobby bits that slightly stick out, and cast very minor shadows. You could either skip those shadows entirely, or have them be cast all the way down to the boots.
Try to avoid 1px shadows along the edges of objects, such on the skin just above the boots (what's causing those shadows?), in the boot lace bits, in the shorts, etc. They don't read as shadows, are prone to cause banding, and generally just make your art look blurry. Either commit to thick, readable shadows, or don't include them.