Love the clone at-at driver. Only criticism would be that I'd have added the shoulder pads, but I can understand not doing that since the clone pilots don't have them.
The colors are perfect though. I'd love to see a concept At-at or prequel version at-at to go with it.
Your little model looks to be about the same size as the concept series action fleet. Maybe you could re-paint one of them in clone wars era deco to go with the new driver?