I knew someone who did ceramic sculptures and saw the glazing process. It looks nothing alike after the firing process. Great job getting down the subtle skin tone changes like the glorious sickly dark circles feel. Even though I wouldn't be surprised if that was just the glaze melting down real far.
If I had to say anything, Ethan has puffier eye bags. Maybe also not add the darker glaze to the nose? Or would that make the nose pop too much? hmm...