I have little to no experience in 3D, but I can say that looks amazing. I can imagine playing this on the PS3, and the graphics rival most of the games I have.
I can see very little similarity between your art and the video, but it seems to have sparked some amazing creativity!
I really like how this is coming along, and I hope you make more!
What I can say is that the new color scheme has made the bot much easier to see, and the walker seems to walk funny, for most 4 legged animals its left-front, right-back, right-front, left-back, mainly for stability.
To me, at least, how you have it looks unnatural, but still manages to work! I still think it needs some fine-tuning, however.
The guns look very precarious, lolling about, etc. Its a nice effect but seems a little exaggerated.