They've chosen a certain look and style and it isn't going to change significantly. If you think the graphics aren't good I would bet that you haven't stopped in the Black Forest and looked around as sunlight filters through the trees, or looked up on a clear night to see the stars, clouds, and Yggdrasil, or that you've never taken a moment to appreciate the look, feel, and sound while you're sailing in a storm. Look beyond the textures, you'll see a lot of beauty.