Nothing too crazy, original, or particularly inventive about it but... I'd honestly want to focus more on character customization as a means of player expression. This would require a rework of the character creator to have more, more, more of everything. Presets as far as faces and whatnot would still exist, but there'd be more emphasis on customizing the finer aspects of one's character. There would be more body types. Players would be allowed to have any style of hair and wear any article of clothing regardless of race/gender.