Those crisis suits are so weirdly designed. The firewarriors have that nice slick, curved shape, especially the helmets, and these suits are just clunky. Too many corners, too bulky, not harmoneous like all the other Tau stuff.
The retracted hands are odd but not a bad idea. The jetpacks are too big and clunky for me as are the missiile packs.
Most weird are the feet. They don't make sense. Even if these are jumping walkers they should have nice strong feet with a heel that can stand up the suit without something else supporting it. That's the point of feet.
How does the suit stand when turned off? How can it land without falling over? It's just ridiculous to me. I love the idea but the implementation looks like a concept sketch (not drawing) that should have been rejected.