I agree 100%, although I don't think there should always be a high level armor for every category. It would nice if they included a legit way to get any armor worn by NPCs. The white Imperial Watch armor would have been perfect for Paladins, but you can't get it.
But the big thing I think is balancing armor. It's fine if Daedric is the best armor in the game, but it should be heavy - so heavy that you can only really have the armor, a weapon, and a few other things. That would make steel much more attractive. Also, it should only be a few points higher in protection than steel -- it would just have a much higher "health" so that in sustained combat, steel will lose it's protective power quicker.
Man, I would have loved to get that Imperial Watch armor, it looks awesome. Anyways, the idea of balancing the armor has been thrown around alot and I believe it has it's good points and bad points.
It makes you think more intelligently about encounters. If your surrounded by bandits, your daedric armor will provide the support needed until you can land a few blows on your opponents. Perhaps your fighting a mage/archer and need more movement. Or your looting dungeons, again, need more movement get on your steel instead of your overwhelming Daedric. And Glass and Daedric would only be different in what's best for you relative to whichever perks you got for that armor. Got a perk that makes Heavy Armor weigh half as much? Put on your Daedric. Got a perk that gives your Light Armor 150% more armor? Put on your Glass.
What should happen, to get back on topic, is that whenever you reach a very high level and the top tier of armor starts to appear, is that there should be more choices to reflect different ranges of combinations of perks. Perhaps an armor made of the scales of Dragons? It could be light armor and it can absorb magic gives mages/spellswords that wear light armor something that's optimal. Maybe a rare metal that is 100-150% stronger than Daedric in armor, but causes you to move at 50-70% of normal movement speed. Perfect for those who wish to "tank" enemies, damaging them at a snails pace, but taking very little damage.
I could give more examples, but more armor would be nice. Different ranges of advantages/disadvantages that could prove more efficient in more capable hands. We'll have to see once more info is released, however.