I am completlyfor somekind of system that allows us to not all be the same. In the past i thought of split classes into two routes depening on there theme, White would have a Nature Path and a Light Path. Machinist a Gunplay and a Machinery etc.
Heck Scholar could be split in Seraph-Scholar and Battle Tacitician.

But i also wouldnt take Blue Mage as example as its by its very nature more a fun whack class.