Making Classes viable is just an annoying balancing issue, and frankly, the worst idea ever... Everyone wants unique jobs, so why would you want people to play bland classes with abilities from all different classes? Bard is just an Archer with some songs, but that's exactly what a Bard is supposed to be... If you want more Bard like abilities, just wait for the Expansion, cause I'm sure the extra 10 levels will bring new abilities for all jobs.

SMN and SCH will start to take different paths with the expansion too probably, and if they ever add new jobs based on classes that already have a job, I'm sure they are changing things around to not make them the same... I say "ever", cause DRK isn't based on a class (might be based on jobs though), and the gun job is most probably based on Musketeer (a new class at least).

* I expect BRD to get more songs or something that makes them more than just an Archer with 3 songs(that you use in combat)
* I expect SMN and SCH to get more abilities that make them stand apart from each-other

You have to remember that FFXIV is a remake, and a lot of features are still left in the game from 1.0, which Yoshi-P wouldn't have had if he made the game from scratch... So what we see with classes and jobs etc, doesn't have to be a way he wants to continue with... in the same way at least... And we are already seeing some change with DRK, just have to see how different that actually will be. I hope it's not just an advanced job based on PLD and War or something...