Tabletop talky
Interesting technique I realized in my system to represent humans being quick to learn as the stereotype goes is to give their heritage path an ability that when you spend a point in it gives you a point back
The reason this works is that for your primary chosen path your heritage path counts its points for unlocking new tiers, which is based on how many points you allocate. Thus humans are able to grasp at higher tiers much more quickly
Tabletop talky
There's only going to be one per tier starting at tier 3 but it will make a difference