That bright turquoise in the spheres is a bit overwhelming. Perhaps it is the vibrancy or just the color itself, but I much preferred the more subtle indigo from the earlier stages of the design anyways. Either way, I think it could benefit from being a touch dimmer. There is nothing on the front sides of the ship to balance out that big ball of blue and it detracts from the rest of it.
It looks like the sphere on the back is actually turned down a bit, or perhaps it has to do with the lighting.