I can prolly adapt the system to work with AP as well but still, you cannot add "little" bit AP, steps in AP are huge compared to steps in vitality.
Let's see. There is a clear difference between Lolita and Manly body types. I don't touch here things like undead or robotic body, they have their own traits. The starting amount of vitality should be different for these traits. Atm Lolita has 100 and Manly 300 vitality from the beginning.
But while it makes sense to have different vitality because of very different (and unchangeable because it's limited by pictures) body types, it makes lesser body types less beneficial, with no
significant advantages. AP is one of the most simple ways to make them more beneficial.