Do you have another picture of him? I agree, his front legs and almost, facial expression, made me think sore, outchie feet, founder etc as well. Or "posty" front end. But its not real fare to judge that on one picture, giving him the benefit of the doubt he could have just happened to stop and stand like that.
Its hard to judge his shoulder with him standing like that. Neck is nice, maybe a little on the long side. Set decent. Back is a little long but not bad. His tail set could be higher/back/croup/butt could be rounder. Almost looks cow hocked in the photo to me again, hard to say from this one picture. Agreed, not great, not horrible, nice trail horse kind of guy.