The appearance could be more than purely cosmetic and it can be applied in many flexible ways. Imagine that during character creation, if you choose a different height you’ll need to fix it by two menus, one of advantages that you will need to rebalance by another of disadvantages (I don’t know the real game variables so I’ll be guessing the examples).
Advantages menu for taller heights: +1 Strength, +1 Resistance, +3 Intimidation, etc...
Penalties menu for taller heights: -1 Dexterity, -3 Reflex, -3 Stealth bonus, etc...
So, if you want to be taller, you will need to c