(1) It seems that Superman, as a character, is criticized for being somewhat two-dimensional. Was there a conscious effort to try and add some greater dimension to the character, for example, Superman having to cope with Lois moving on with her life in his absence?
I think it's easy to write Superman off as a two dimensional character because he always seems to be a "big blue Boy Scout" who always does what's right without much personal conflict, but if you look deeper, you'll find he's a very tragic hero dealing with issues any of us can relate to. On an almost mythic tragic level, he's the only survivor of an alien race, sent here by his father to guide and inspire us. On a more personal level, he's an all-American kid who grew up on a farm, and is still trying to figure out how or if he fits in, plus trying to win the heart of a woman who only seems to love part of him. The themes of identity and finding your role in the universe are things we can all understand, so in that respect I don't think he's two dimensional at all. If anything, he can be just as conflicted as Batman, Spider-Man, or the X-Men, but in his own way.