I don't think Supermans suit is just changed for the sake of changing, Snyder wanted to give it a more alien-like feeling. I think by the end of the film he might have his more traditional suit but we'll see. Plus the new 52 suit (which this was based on) has some texture or at least details to separated it from the old ones.
Plus it probably wouldn't be that noticeable in film. Rouths suit also has subtle texture in SR but you really would not be able to tell.
At least this Superman wouldn't look lanky or frail.
Texture on Caps suit? He's uniform has always been "scaly", it's like his chainmail.
And even more emphasized these days.
I do wish they tried to pull off the look in film. I like the texture they used on Thors sleeves, a smaller version of the scales could have worked well.