Quickfooted should give stability as if having +2, but gives as if having +3. Each agility point gives +1/3 stability regen, each quickfooted gives +1 stability regen.
com/majalis/AbstractCharacter
protected int getStabilityRegen() {
return 1 + getAgility() / (isOily() ? 6 : 3) + this.perks.getOrDefault(Perk.QUICKFOOTED, 0) + ((getSecondWeapon() != null) ? -3 : 0);
}