An adjustment to the Watercolor mode to remove the brush texture applied to the camera (or have it slider controlled), allowing us to achieve a cleaner Cel-Shaded look. The current texture is too noisy and doesn't work well for animations. The Sketch mode would also benefit from an option to choose between regular shadows or hatched shadows.
I agree, the brush texture applied to the camera makes the image appear too busy.
The texture makes it impossible to create watercolor videos. As the camera moves, the texture doesn't. It makes it appear as if the lens is smudged.