This Guy Lee is really awesome, for the body I think only the left triceps is a litte flat and elbow not as well refined as everything else, there are 2 epicondyles of the humerus on the both side of ulna (elbow) and they seem gone
For the seams try to CTRL + W whole model for polygroups to merge into 1 and then z-remesh with the lowest polygon count for nice starting topology, then smoothing is very fast