while having loads of different hair models is great with various was to manipulate those styles, it would be better to have a tool that allowed you to change those styles even further by either cutting or styling the hair with set tools designed for that purpose.
A shaver to cut down hair length
comb to change which direction the hair goes in
You could download/buy a hair style and think that would be much better if the hair was combed over the other way, the comb tool would allow you to change the direction of that hair, or maybe even a blow dryer to shift the hairs pattern the other way.
You might have a hair style that looks great but you want to shave the sides but the style doesn't have a feature for that, so the shaver tool steps in and cuts the hair in the shape you want at the length you want.