That doesn't mean every material has to use every style, there could be a blade styles unique to certain material types.
Of course, there could be. There might be some ways to make it interesting. But I don't know. There are so many materials in game, meaning that there will be a lot of the same gear, simply recolored. This is totally realistic by the way, nothing stops you from shaping these rare metals into various shapes. But when you find essentially the same gear you wore from level 1, just in different color, it's not the same.
So I am not sold on the idea. I think that unique designs are more interesting. While there still could be some variety, like several types of helmets for an armor, slightly different chest pieces, etc.
And I definitely agree that there should be differences between materials, not only in durability and damage/protection, but some more interesting distinctions, so that there would be a reason to wear different armors for different characters, apart from their look. Instead of giving flat armor rating to all pieces, armor can get different protection from blunt/piercing/slicing damage, elemental protection, stamina use, magic reduction, etc. Dark Souls style.
For example, Daedric Armor might provide some of the best defense and also protect you from fire. Fur Armor might provide very poor protection, but better protect you from cold. Silver Armor might have lower durability and severely reduce your use of magic effectiveness, but provide better protection from magic at the same time.
P.S. Look at two armor pieces from TESO, for example. The design is not bad for this armor. But one variant is made of iron and can be crafted at level 1, other one is dwarven metal for level 36. I just somehow think that if there were only one version of the armor, it would be more valuable, more interesting to find or craft.
IMHO unique is the way to go. If there were only like 3-4 materials, it might be a viable option, but when we have Iron, Steel, Silver, Dwarven, Mithril, Elven, Orcish, Adamantium, Ebony, Daedric - it's a lot of repetition. We might do it out of necessity, though, if we don't get enough artists to model unique sets.