I just checked out your thread, and I must say I really like your idea (as it is very similar to what I had in mind). The standard jobs would be jobs that would be easier to understand and play. Best example would be from FFXI; the difference between a MNK and a NIN (tank) is great. The same with a late game RDM. The standard classes would teach you the basics, and the advanced classes would have a spin or different playstyle to their mechanics. But don't get me wrong in saying advanced is better. White mages would be a standard class yet still be the most potent healer.

The one thing that I don't like about adding another layer is that it's another thing to level. I think the best way to implement the job system is by tying it to physical level and then have extra bonuses once you reach level cap.

I hate to comment about another thread inside this thread, but once again I want to say I really do like your idea. ^^

Still, if anyone has comments or feedback on my idea just post it here!