Don't worry, Light Suit is an alt color for Samus. However I wish they could have redone her mesh to more accurately match the source, but I understand why they didn't.
On the subject of Samus's sexualization, I think Smash Bros's heels addition is fine. It gives a bit more breadth to Samus's non-Power Suit arsenal.
I am not a huge fan of the ZS's existence in general. It was acceptable in Zero Mission, but Other M really emphasized all the wrong aspects of Samus. Unlike someone such as Bayonetta, who exudes confidence to wear nothing and shoot bullets in demon mouths. Samus was far from that character and didn't need the body redesign to match someone she wasn't.