I hope you weren't expecting too much "grittiness" from a Superman film. Superman has always been a good, clean hero and it looks like that's not changing too much for Man of Steel. Despite Snyder and Nolan's gritty take on the hero, it's still getting a PG-13 rating to the surprise of that one guy who never pays attention to any of this stuff.
And if you're mad about any of this...at least it isn't rated "G." Wait...that actually doesn't sound too bad. Someone get on that.