Salamandyr
Adventurer
I don't care what Conan did. If the character concept is a warrior that has only been trained in light armor, then the game should give the character something in exchange. Later if the character wants to learn medium armor or heavy armor, they should take appropriate feats (and, yes, I want to see the armor and weapon proficiency feats return)
The game does give the player something in exchange. A character in light armor can move further in a round than a character in heavy armor. Also, they are better at stealth, and depending on their dexterity, they may be almost as hard to hit as someone in full plate.
So level of protection becomes a question of how much you leverage protection versus other things, like comfort, speed, and skill use...pretty much like real life.