I partially agree with you because I don't like new Xardas' face too much. Moreover, his hair is also set to back but this is not so important. Maybe I'm a too orthodox Xardas' fan but he seems different to me.
About his robe I can't understand if he wears an armour or a cloth robe: I think that in GR is a cloth plus leather robe too. Original Robe of the Dark Arts consisted of dark blue clothing with red symbols, a leather mantle with large peaked pauldron and a metal belt with demon wings and a red stone. Here we have to wait and see.
But old robe was not as skin-tight as the new one. 
Anyway, the original design benefited from a fitter, grittier-darker aesthetic, whereas the new model looks more polished and groomed, almost as if he just stepped out of a barber shop.
