I think what Liefeld's biggest problem boils down to is he need to seemingly FILL a certain area of the page with the character, no matter what kind of odd scaling that results in, probably because he's terrible at backgrounds.
If you had someone else drawing the backgrounds, I think Liefeld could put out some much better work.
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~LtM
http://img.imgcake.com/AYhRdKCMAAjGS3jpggy.jpg