I hated the whole "the better-the heavier" concept. And not particularly a fan of iron-to-daedric thing either. Kinda boring, made acquiring heavier and heavier armor & weapons until you get to daedric the sole point of looting. And you couldn't get daedric armor from daedra's in Kvatch if you were low level, because of the stupid leveling, to which everything was bound.
I know it's the whole point of RPG to acquire better material equipment, but I wish it wouldn't be a simplistic linear bad(light)-good(heavy)-better(heavier)-best(heaviest) line. Instead they each should have their own advantages and drawbacks. For example while daedric shall provide most armor or DT or whatever, Elven shall be the lightest (notice that not being the worst armor however), mithril shall be the most durable (hardest to break) etc. That is just an example mind you, I don't know which should have what advantages or anything, just an example. That way everyone can find their favorite set/material instead of just simply "getting daedra" so to speak...