raw stats are also good customization
full Armor Pen geming was gamebreaking and got nerfed
Dodge rating as rogue was abused and got nerfed
full geming stamina was also overpowered at some point and spells got nerfed because of it
The entire MOBA genre is about customization of raw stats
haste
crit
stamina
avoidance
They are also good customization for a RPG