I think he looks great- although I gad little trouble finding the face initially- so maybe a nose might be appropriate. The brows fit in really well with the rest of the branch -nice sculpting work. The only thing I might suggest in addition is maybe a beard of smaller branches jutting down and out to define the face area abit more. It's probably not the look you're going for- abit old man of the woods/ent type thing but just thought I'd mention it. He looks really great regardless and that witch hunter looks VERY impressive.