I would say you improved on everything but the arrows and the gradident portion of the textures. Here's an example of a good gradient. The key thing to note is the tranistion from dense detail to sparse detail. When you want to show textures that are closer to your light source try to think about using the least amount of detail possible while still keeping the texture recognizable. If you want show the texture in shadow along side the shadows being bigger also try to add more details to show this as well.

For your arrows the issue the size of the x you make when you cross over between them is too tall. You want to make the x when you cross wide rather then tall. If you do that your arrows well look way better in future.