Very interesting drivetrain! I like the shape. As others have said, the bumper mounts on the frame probably need to be stronger. If you use those custom gearboxes, covering them would be a good idea to keep debris, wires, loose parts, etc. out of the gears. There is a PCM near a CIM motor, but I don't see any pneumatics...is it there just in case some will be added? I think the battery connector mounted on the robot is a good idea, but could be higher to avoid bending the wires too much. Maybe a smaller mount too so connecting/disconnecting would be easier. As for practical use in a game, this would probably only be effective if the robot needed to reach something higher up so the frame wouldn't get in the way of doing so, as in 2011. But just because there hasn't yet been a game where this would be practical doesn't mean there won't be one in the future... If nothing else, this would be an impressive demo bot. I wonder how fast that thing could spin in place with all 6 CIMs running at full speed...
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"There's nothing a little duct tape and surgical tubing can't accomplish." - Sheldon J. Plankton