I wouldn't go as far as letting for example paladins look like black mages, but I wouldn't mind casters sharing robes. So DoW/DoM separation would be on point. But then again, a lot of robes are already available to all (from a caster point of view), it might just be the colour that isn't the same. And for example the esoterics gear should not be shared as it was designed for each class individually. To be honest, I am fine with the system as it is. /shrug