the logo on your web page, that blue shape seems to be complicating it visually. The problems with the earlier versions, against the cloudy sky, mostly suffered from a lack of color contrast between foreground and background, i.e., all coolish colors. Then for the web page, you've lightened the lettering (and I really like the metallic texture you've done). I think the lighter tonality would work well against the purplish cloudy sky.
As for the robot, not sure it's working yet. I would say solve the color issues with the 3D logo, then figure out where the robot goes, body language, contrast. In general, contrast is the main thing. Get the lettering to come out in front of the background, whatever it is. warmer/lighter for the foreground, cooler/darker for the background.