That's a pretty cool design. I love the helmet and the whole aesthetic of the suit. It definitely gives a bit of a bug-like design, but without being too obvious.
One minor thing that I wonder if it would work is adding a bit of color variations. Right now the character has different shades of gray on different parts of it's armor, but all look like straight grays. Maybe playing with warm and cool grays could add just a little bit of extra interest. Like the darker section being cooler and the lighter ones warmer, or vice-versa. I'm not sure if that would work, but I'm just giving you the idea in case you hadn't thought about it.
With that said, I can't wait to see how he turns out!