There are a few things that challenge sculptors moreso than anatomy, clothing, details.
Hair. It’s just one of those things you can’t actually represent as a solid object without changing it dramatically just so it can be represented in the medium you’ve chosen.
A few people can rock this haircut pretty solidly – gone are the bullets and some of the locks. Still working on details and elements, and soon – there will be a full final pose. And that in turn will require more sculpting.
But that’s another post.