Would you guys like to see a higher tier armour? Better than Deadric, Dragon and Glass? What types of armour would you guys think would be suitable?

I'm not sure. Isn't Daedric considered the highest tier armor? What could be higher than that?

I would prefer more mid level armor, and more variants on the materials we all ready have.

I wouldn't mind seeing Stahlrim Armor back in. That was the best Light Armor in Morrowind, better than Glass, and also fits the theme of Skyrim. But i don't think it would be better than Dragonscale, lorewise. Adamantium Armor could make a comeback as well, as a mid-tier Heavy Armor just above Orcish. Trollbone Armor would be interesting as well, considering we already have Troll Skulls all over Skyrim.
But lorewise, the only thing that's better than Daedric, are Artifacts. The Dragonbone Cuirass in Morrowind was better than a Daedric Cuirass, and even had 100% Fire Resist on it.

I would like to see more "lower tier" armor. I hate that term, since it conjures the image of playing an MMO however. I want more armor types, but nothing as powerful as Daedric. The game loses its challenge.

Mithril
Trollbone
Adamantium
Bonemold (no, this is not dragon bone)
chitin (no, not mudcrab or chaurus)
dreugh