I could be wrong, but if memory serves correctly in TF1 you never actually see Barricade in natural daylight therefore depiction of the blue highlights may never be apparent. The scene in which he interrogates Sam is at dusk and in shadow cast by the bridge overhead. The scene in which Bumblebee and Barricade face off is in limited light at night.

With all of that said in DOTM you do get to see Barricade in natural light when the snipers take his eyes out, and I recall no blue highlights in those scenes.

I actually personally think his head looks right, I feel the issue is it's position on his shoulders, its possible it has simply been incorrectly posed / transformed???