Colored gear with specific classes.

[Betelgeuzah]

Uniqueness across Classes is determined by the design of the Armour, not the color.

Now they are determined by both.

Earlier only armor model determined uniqueness, so every class shared an armor set, pretty much, and only had weapon to distinguish themselves with. People didn't like this, as there was no class uniqueness.

Now each and every class has its own theme dictated by model and color. You can't deny that, because it is a simple fact. The classes have become more unique in aesthetical sense because of that.