Hmm interesting, I think I would fine with it as long as you can't excel to MUCH in any 1 skill, and make sure there isn't any op combos. For example, someone could do full tank, and then learn the cleric mana regen spell, get the best priest healing spell and then be invincible, that's if I understand your idea of the class correctly, also would thier hp/mana be same or could you also customize that? I was also had an idea, I remember how some items had special effects but there was no way of knowing what they actually did, we had to ask you or old old players whom knew it, I think that you should put like information in libraries, quests, chests hidden around the world that tell you about items, and what kind of hidden stats they give, maybe what certain monsters can drop, etc..