I think the fact that Clu didn't look perfectly realistic was a good thing. He was supposed to be a computer construct, after all. As I've mentioned before, the makers of the original film weren't trying for realism, but just the opposite -- they were trying to make the live actors look as much like computer-generated images as possible given the limited technology of the time. Personally I feel it would've been truer to the original intent if all the Grid scenes in Legacy
had been fully CGI with performance-captured characters. So Uprising
actually comes closer to how I think the Grid should be rendered, at least in principle, but I'm not happy with the designs and execution.