Definitely doesn't need improvement! :D
That's CHARCOAL??? Holy cats! The one thing I've always envied is artists who can excel in these mediums. The blending looks absolutely marvelous! I can ink my line arts and photoshop color in them all I want, but I have zero skill when it comes to working with traditional mediums (and believe me, I've tried! XD), so this really blows me away, because it's just so smooth! Anyone can learn to color with a computer, but it takes real talent to work with that which is tangible, and can't be fixed with the click of a mouse button. Bravo! :D