I'm gonna have to disagree with you on this, mainly because I feel the main classes as they are now are sorta weak. I don't want to be a gladiator with a paladin specialization, unless of course that changed my "class" and allowed me to equip paladin armor. really, the only way I can see something like this working with the armory system, is if you have enough points in a certain "tree" you could become that class and thus could use the specialization's armor/weapons.