It almost feels like they chose that texture for Godzila because it's easy to render...I especially feel it when I look at the screenshot of the bird monster, who seems to have the same texture as G...
I definitely believe they're taking the idea of him being godly or nature's wrath to a new level with this film and that he is not just some animal but a physical manifestation of the earth.
In posters and such, it looks kind of meh, but some of the trailer shots look wild.