I just dont know why all those RPGs do all things class specific, is it tradition or somthing (d&d)?
I think most people would like tatal freedom more, and if they dont in a game, they can just make a pure WIz/Warrior/thief/whatever character.
And with the restrictions, why shouldnt a warrior be able to equip a staff or read a scroll? There may happen something wrong but at least he can try..