Just a small thing I noticed when working with small details. If I have a very small object which should have an outline, the outline will cover the fill. There should be a way to make the outline render below the fill (without haveing to create to seperate fills).
The fill, the outline.. these should be elements in a stack, making it so you can have more than 1 fill, and more than 1 outline.. you could order this stack.. Illustrator does something like this.. Pretty cool