dont get me wrong, Daedric was one of my fav parts of the game, but with the whole rugged landscape of Skyrim, it doesnt seem to fit with the environment, which is one of the things that Bethesda said they would try to do.
Exactly how would it not fit the landscape? The daedra and their armor set change with each new game, it's simply a matter of redesign while still keeping the core ideas intact. The armor is red, jagged and terrifying, but that's a rather vague description with lots of possibilities for variety. Even in morrowind there were three unique daedric helmet designs.
Daedras are similar, a Frost Atronach looks vastly different from one game to another. Spider Daedra don't even exist in Morrowind, afaik, and in Skyrim there could similarly be new daedric types introduced e.g. Snow Daedra or even a return of winged Seducers or fire and frost daedras (not to be confused with atronachs).
There's also the Fire, Frost and Storm Monarchs (epic atronachs), creatures that to my knowledge hasn't even featured yet in any game, they are only found in lore.