I think I've narrowed down a look. Here's the current and new art styles back to back in color/white environments.The reflections are a lot better. I still say you should play as cubanoids, but with the ability to morph into a cube for hiding. Kinda like the box mechanic in MGS 4: Online.
Still needs a little more work on the outlines themselves to make them look more physical, but I really like the general feel.
*These are pre rendered concept art images, not screenshots.