That's a very good job on it. It should have been more like this in Skyrim, yes. What I like here is the blunt, rough feeling of the edges, something that is NOT perfect, NOT sleek, but barbed, twisted, reflecting the image of pain. Daedra are suffering.
I never understood why they made it so similar in color to the ebony and orcish armors. I always though the dremora and other daedra should look more otherworldly or demoic, and that armor make from them should reflect that. I really liked the glow from skyrim's version, and the dragonic feel. It seemed like it wasn't made by humans.
As far as dremora armor, the helmet looks almost akaviri or like the orcish armor you did (and the originals you based it on), very... japanese? Fake mask ... However here is doesn't look... scary. I think it's the fangs? Too overblown and if you look up the originals or other samurai masks they don't look quite like that.
I personally think having something that looks more like you tore off the dremora's actual face, lips pressed together, no fangs (I have yet to recall a dremora lord with fangs) and just burning red pits for the eye sockets... would come off as more demonic while still staying true to both the original morrowind artwork and the mask idea.
The samurai masks look pretty silly. If this one's not scary to you, too bad. It's made to look asian. Mostly because if you look at Mehrunes Dagon (who's servants are the Dremora) he's pretty much a direct rip off the Indian goddess Kali. Indian demons had exactly this kind of teeth in most of their depictions. blogs.bootsnall.com/JamesM/fil…
As for Skyrim design - no idea why it should be draconic. Dragons have nothing to do with Daedra. As for the colour scheme - Daedric Armour is made of ebony, therefore it should be pretty much the same colour, just with the addition of red stains.
It's because they serve Dagon that I think they should be frightening, but I will concede that that does remain a matter of opinion. I am wondering if you'll do more masks.
I do think that in skyrim the stylistic choice of armor was really just: This looks cool, let's do this. While I have no complaints, it's obvious you think it shouldn't look dragonic... and I can understand that. I personally didn't understand why they didn't make other styles possible because I think that, as armor is /craftable/ you should be able to make it look however you want. This is not reasonable for a game, of course. Still, dremora aren't indian demons, no matter how much mehrunes dagon is a allusion to kali. They're not restricted by those rules and it's possible the armor has, over time (or something), come to reflect a desire to look more menacing. Who knows how daedra work? Or maybe they're weirdly region locked? That would be silly. I guess it's really a question for the developers.