Some feats for a fantasy campaign without magic (Please Critique)

[Angel Tarragon]

Armor Specialist [General]
You are able to get the most out of whatever kind of armor you are wearing.
Prerequisite: Armor Proficiency (Heavy), Improved Armor Proficiency
Benefit: You are better able at protecting yourself in whatever kind of armor you wear. Your armor bonus is increased by +2, your maximum dex bonus is increased by +1 and your armor check penalty is lessened by two (to a minimum of zero).
Special: The bonuses from this feat replaces and does not stack with the bonuses from Improved Armor Proficiency.

Armored Juggernaut [Epic]
When equipped with armored forged only of steel you are a formidable force in combat.
Prerequisite: Epic Armor Proficiency (Heavy), Armor Specialist, Improved Armor Proficiency, Steel Knight
Benefit: When you wear armor that is forged entirely of steel (half and full plate) your armor bonus is three times what it usually is.
Special: This armor bonus from this feat does not stack with any other bonuses from other feats.

Improved Armor Proficiency [General]
You are more adept at getting the maximum affect out of your armor.
Prerequisite: Armor Proficiency (light)
Benefit: Your armor bonus is increased by one and your armor check penalty is reduced by one (to a minimum of zero).

Steel Knight [General]
Long hours of combat training and field experience have allowed you to get the most out of any armor with any amount of steel in its composition.
Prerequisite: Armor Proficiency (Heavy), Armor Specialist and Improved Armor Proficiency
Benefit: When wearing any armor that has even a minuscule amount of steel in its composition you gain half of the armors bonus (fractions rounded down to the nearest whole integer) on top of its full bonus to your armor class.
Special: The bonus granted from this feat stack with the bonus granted from Armor Specialist.
NOTE: The armors that this feat applies to are: banded mail, breastplate, chain shirt, chain mail, full plate, half-plate and scale mail.

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Thoughts?

 

[CRGreathouse]

Armored Juggernaut is hard to judge without knowing what Epic Armor Proficiency does, but it seems powerful -- it gives an effective +10 to AC in full plate (+16, less the +6 from IAP, AS, and SK). If it's split over two epic feats, it's still powerful -- Armor Skin gave +2 to AC in the ELH and +1 to AC in CW as an epic feat, so your version is much stronger.

I might change "...even a minuscule amount of steel in its composition..." to reflect the armor list: banded mail, breastplate, chain shirt, chain mail, full plate, half-plate and scale mail

I could see a player arguing for (cringe) studded leather under the feat's wording, even though it's not on the list. Perhaps "...steel as a major component..." or something similar?

Also, I'd change "(fractions rounded down to the nearest whole integer)" to "(fractions rounded down to the next whole number)" or even "(fractions rounded down)", since you're rounding down, not taking the closest integer.