Class Homogenization.... Why do you want it?

[sharazisspecial]

I don't think being "special" works when it comes to tank jobs. Outside of different styles of tanking(reactive vs proactive)

It may work for dps and healers. In fact bards are pretty "special" since they have powerful buffs and they are in demand. FFXI you would generally use which tank was better designed . But you could get by with a variety of healers and dps.