I can't get enough of those art illustrations, I think it was one of the most beautiful things in the game, they must to keep and expand the bestiary/book system, it's just perfect .
Also, I like that LoD image, he looks good, quite death-like. Still, while I'm a LoS fanboy, I liked the LoD design for what it is, and it kinda reminds me of death, enough to draw a paralellism, without forgetting that they are different characters, which people tend to forget sometimes.
There's no point in saying "But he should look like this" because they are not what you think, what you want them to be, it's all new, it's based on Akumajou Dracula, but it's not, it's Castlevania; kinda what Dragon Ball is to Odyssey to the west, and what Enslaved is to Odyssey to the west, what Batman Begins Series is to Batman (Ra's al ghul trained Batman, Joker was not desfigured in a chemical accident, and that stuff... does that rings a bell for you??).
Akumajou Dracula was a pastiche of horror conventions, and this new Castlevania is a pastiche of that pastiche, fair enough I guess.
It doesn't hurt that it's a great game too.