Nice mod! I like they way to go with it.
Here is some feedback. (more like nitpicks)
Can you scale the intelligence perk a bit down, so that the vault girl is approximately the same size as the rest?
I like that your vault girls are generally a bit bigger that the original ones, but sometimes those animations conflict with the stars, that show the perk level. For example your "Fortune Finder" girl raises her fortune in exactly the same positions to the last star and therefore its hidden behind. Maybe moving your animation a bit to the right would help?
Is it possible to later have some different skin complexions and hair colors to choose from? For example ebony skin and dark/black hair, red hair, etc. Just some different 'races'.