While working on Ella's expression sheets, my intention was to use her facial arches as substitutes for her eyebrows. Unfortunately, I was using very straight lines to do this. After talking to Justin, he told me that such straight lines don't really work for organic characters and advised me to use more curves. Having taken that on board, I got some really pleasing results with Ella's expressions and I am very happy with the outcome.
Let me know what you think!