I agree these are supposed to be combat aircraft, not flight demo birds. So it makes sense to me for the color schemes to be flat and matte.
And your usual combat aircraft colors are dulled for to avoid detection in some way shape or form.
Sure they are of the giant robot vein (sort of), but I like to think of it as a touch of realisim.
Besides if the the designer sanction it the that must be what he intended.
Sure I understand the urge for these toys to be in that nice shiny gloss that is easier to clean, but it just would not be the same.
Hell I'll take them either way!!