I had this thought as well. let's just say for discussions sake this ends up being a trilogy. in this 1st one, it's an alien suit apparently left to him by Jor-El,so it looks how it looks. by the second movie he's changed it a bit.perhaps removing the forearm guards and the belt/leg armor stuff to appear a little less "alien". then in the 3rd film he's changed to a more "friendly" looking version similar to the comics - brighter colors, and a non-textured suit.shows a metamorphosis from Kal-El, Kryptonian to Superman, Champion of Earth.
this being said,I DON'T hate what we've got now. it took a little while,but the suit grew on me. I would be fine if this is the only suit he wears. but it wouldn't surprise me if the filmmakers are "coaxed" into changing the suit up for any future sequels for a merchandising standpoint,if nothing else.