My only suggestions are:
1. Change from 38% water as percent of oils to 33% lye concentration. That way, if you adjust your batch size up and down, your batter will be more consistent. As written, the recipe is at 25% lye concentration, which is a lot of water for a CP soap recipe.
2. Add sugar or sorbitol at 1-2% of oil weight to assist with lathering. High-butter, low-CO soaps can take some work to create lather, and the sugar will help with that.
3. Add sodium citrate at 1-2% of oil weight as a chelator. You never know if your users will have hard water. If they do, a chelator will aid with cleaner rinsing (esp important for the face), and will help with lathering, preventing DOS, and lessening soap scum.
HTH, and let it know how it turns out. I haven't made a high-shea bar for awhile, and now you've got me thinking that's it's time!