The thing with dynamics hair is it grows from roots, and if u have it inside the skull too deep, it wouldn't be realistic, and there's no way to get the hair grow evenly - it grows a certain length from wherever it stems - and for some people - creating new hair groups can crash the comp when rendering. What I would like to see is the ability to control the growth of selections of hair from a group - and since hairs have verts - to have direct control of the verts. It's hard to style when you can only pull hair from the tips.