Idea don't know how hard it is for you implement
I have used a program in the past called design doll http://terawell.net/terawell/?lang=en
This allow you to modify aspect of the body with set ranges which is great ability and very useful. To a great level this could be extremely useful if possible.
This would allow people the have widely different character builds to be a one stop shop for everything. I don't know how hard it be to work in to some level.
Keep up the good work and thank you for you time