Man of Steel was mostly fine, but one huge problem with the movie was that it was just too dark. It embarrassingly cribbed its visual style off of Nolan's Batman trilogy and that dark tone just doesn't match up well with Superman. Visual Lab decided to restore the colour in the film and it looks so much better.
Like it's not even close. The "original footage" from the movie looks terrible compared to the version with the colour restored. The colour makes Superman pop and the whole movie seems so much more fun to watch. Watch the video below: