I like your illustrations, but they do have one glaring problem. You seem to have a bad tendency to make the hair and headpieces really thin and low to the Head, when in reality the you'd need more thickness in the new hairmolds to make sure they don't break. I think this will also help some of them look a little more authentically "Lego". Finn and Gaston are particularly good examples of this; I doubt their hair would even cover the peg if they were genuine plastic. Your bodies are perfect so the hair stands out as an issue.