Goblin models are too cute, clean and even stylish to be goblins. It totally breaks the game's immersion.

They are telling distusting and awful things as it hould be in a DnD game but their models and expressions are too cute and catoonish which does not fit with rest of the game's style.

They should be uglier, more dirty and more irritating. However, they just look like World of Warcraft goblins!!! Unfortuately, this applies most of the other creatures. Humanoid characters are insanely detailed and very realistic but monsters and creatures are too cartoonish.