Love the changes they've made to the suit, in particular the slightly brighter blues and reds. I hope that's reflected in live action also and not down to the colour adjustments made in that picture alone.
On first impression, I thought the sound of a square belt buckle area was just wrong - but looking at it, it provides a cleaner and more concise divide between the top and bottom areas of the suit.
As much as I love the MOS suit more than any previous one I've seen in live action, without a belt/trunks like traditional Superman costumes it does suffer very slightly from the all-in-one effect - like a wetsuit. The enhanced buckle effect, coupled with the cleaner lines on the piping and such do a lot to counteract this and separate the top and bottom halves of the suit.
An all-in-one suit isn't necessarily a huge problem, but I do think it sometimes gives a slightly androgynous look if not handled correctly. But that probably stems more from western culture, where we've had pretty much decades of seeing men in trousers/trunks and girls in skirts.