Atrox does have a disadvantage, but if your fix for this is atrox only armor, you might want to see what everyone is wearing. If the atrox only armor is not better than that, then no one will use it.
What im talking about is more on the lines of the Armor's special abilities, not just armor class rating. We all know that mobs hit for min. damage, so having anymore than 3500 ac doesnt make that big of a difference.
The armor should be better than MK2. Why?
because at higher lvls, is where u really start to see the disadvantage of the atrox breed caps and like I said, If the specials are not better then NO one will wear it.
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I would suggest 2 types of Atrox armor: w/ its specials geared for
-Ranged attacks
-Melee attacks.
Without 2 different types of armor, you will leave out half the Atrox population.