I'd be happy with barbarian as a subclass. In the last few years I've become very adverse to new class just for the sake of a single gimmick or narrow theme.
I have to ask what archetypes? Outside of Conan their are very few "uncivilizied berserking war god" characters, that I can think of anyway. Perhaps Druss the Legend, but he and Conan are strikingly similar. I am not sure there are enough characters in literature or pop-culture to qualify "barbarians" as an archetype.
All all that is too complex to fit into a subclass, its should be its own class so you get the diversity of archetypes.
I have to ask what archetypes? Outside of Conan their are very few "uncivilizied berserking war god" characters, that I can think of anyway. Perhaps Druss the Legend, but he and Conan are strikingly similar. I am not sure there are enough characters in literature or pop-culture to qualify "barbarians" as an archetype.