It does kinda suck that every piece of armor that isnt lvl20, 24, 25, 30, 35, and 40 all look the same.
I higly doubt they will be doing anything about it now, and plus, those levels I listed above are some of the best/unique sets sts has made.
Look for yourself. Those are the different sets that people pick pieces off of to look unique.

If you are looking for some serious customization in your characters look, stay tuned for DL.
Where looking unique and having a variety of different looks/clothes to choose from was important in the making of the game.