At this point does it really matter? This has been brought up for some time now and the answer is always something along the lines of "No, it's a useful gameplay visual" and yet at lower graphics settings the trim is removed entirely, so in other words, it is not necessary. Even among the other races, there is hardly any equivalent. The eldar? No armor visuals at all. Chaos? By default their armor is trimmed with either bronze or silver, and most of the time it fits. The orks? Again, like the eldar, hardly anything. Better yet, just make it a cosmetic item that people can equip at their leisure. I'm quite tired of having some cheap looking aluminum outline on my bright red armor.