In lieu of all races being granted some type of Racial Toughness. I propose the following in order to balance all races such that there is a glorious harmony amongst all their enhancements and they can only think happy thoughts.

Dwarves, Half-Orcs and Warforge would be limited to Racial Armor Mastery II, and Racial Armor Agility II.
Humans, and Half-Elves would be limited to Racial Armor Mastery III and Racial Armor Agility III.
Drow, Elves and Halflings would be limited to Racial Armor Mastery IV and Racial Armor Agility IV.

Racial Armor Mastery
1. Racial Armor Mastery 1 - Cost 1 AP
Increase the Maximum Dexterity Bonus of any type of armor the character wears by 1.
2. Racial Armor Mastery 2 - Cost 2 AP, Requires Racial Armor Mastery I
Increase the Maximum Dexterity Bonus of any type of armor the character wears by 2.
3. Racial Armor Mastery 3 - Cost 3 AP, Requires Racial Armor Mastery II, Racial Dexterity I
Increase the Maximum Dexterity Bonus of any type of armor the character wears by 3.
4. Racial Armor Mastery 4 - Cost 4 AP, Requires Racial Armor Mastery III, Racial Dexterity II
Increase the Maximum Dexterity Bonus of any type of armor the character wears by 4.

Racial Armor Agility
1. Racial Armor Agility 1 - Cost 1 AP
Decrease the Armor check penalty of any type of armor the character wears by 1 to a minimum of 0. Decrease the Arcane Spell Failure of any Armor the character wears by 2.5% to a minimum of 0%.
2. Racial Armored Agility 2 - Cost 2 AP, Requires Racial Armor Agility I
Decrease the Armor check penalty of any type of armor the character wears by 2 to a minimum of 0. Decrease the Arcane Spell Failure of any Armor the character wears by 5.0% to a minimum of 0%.
3. Racial Armor Agility 3 - Cost 3 AP, Requires Racial Armor Agility II, Racial Dexterity I
Decrease the Armor check penalty of any type of armor the character wears by 3 to a minimum of 0. Decrease the Arcane Spell Failure of any Armor the character wears by 7.5% to a minimum of 0%.
4. Racial Armor Agility 4 - Cost 4 AP, Requires Racial Armor Agility III, Racial Dexterity II
Decrease the Armor check penalty of any type of armor the character wears by 4 to a minimum of 0. Decrease the Arcane Spell Failure of any Armor the character wears by 10.0% to a minimum of 0%.