I do think Dremora wear armor. Dremora are a Daedric Prince's variety of humans in their realms. They jsut wear armor but armor made from materials forged in the Oblivion planes outside the laws of physics/the earthbones.
Not really, as I understand it, the Dremora don't wear any armor, it is apart of ther skin/appearance. Daedric armor is fashioned from their essence, by absorbing it into armor.
However I think that Ebony is the only material strong enough to hold Daedric essence without falling apart.
This, therefor:
Yeah that's strictly related to tiered gear. No actual reason.
So ebony + leather = Daedric Light Armor. Sort of like Imperial.
This is not possible. There is no light armor material capable of holding a Daedric soul. Glass might be able because it's material is close to ebony but it wouldn't be lore correct.