You're missing the point if you're treating the suit as if it has to accompany an one side of the spectrum (regarding choosing either Kryptonian and Earth heritages). Clark himself is a citizen of Earth, there's nothing different he has over other humans that all of a sudden, it needs to be outlined. The suit is a way for him to not only accept his Kryptonian heritage, but to show how he's a bridge between both sides (The wearer was born and raised with human tendencies, while the suit displays his ethereal and superhuman features). Editing the suit to make it have more "Earthly" features disrupts that balance and makes him come across as if he doesn't give a **** about his Kryptonian heritage. In other words, the suit isn't supposed to be some sort of "I'm on one side, not yours" cliche, it's a part of an assemblage that is Superman's identity.
Man of Steel didn't simply display him as a citizen of Krypton, it showed Clark's attempt to balance between both spectrum of his heritage.