How many times have you been asked to add heavier armor? 
there is no weight limit to worn armor, or is there? (Hypothetical for thought)
Theres good armor for early game to add a little defense with the civilian set. 
Does the bonuses provided by these sets scale with level? Maybe they would do better to scale with the stats, under an overall percentage based on the character level. 
Example, because people enjoy misunderstanding(all you punks that dislike math, tune out) 
say theres an overall possible improvment of armor stats by 50% for warrior, 30% for succubus. say every 1 str is .1 % added defence, and 1 wis is .05% added defense to armors.
Alternatively, large increases to a single armor piece, with an attribute matching to a specific slot's armor. 
Nearly everyone understands putting stats into wisdom for more mgc atk, or into str for more phys dmg, but does anyone thing of armor bonuses? Not many. Its an underappreciated facet of maximizing gameplay.

so someone diligently practicing magic can still gain wisdom (think of it as like magic hardening of the skin, small improvement for combat (very small haha, well youre a mage ya'know?) or getting those gym hours in if you put stat points into str, you got that chest that stops those random people test punches.

you can also specialize armor to gain bonuses from multiple stats, or require multiple stats to wear. 
i understand succ is rogue, but i wanna wear heavy armor and frick. lol.