I just think Jobs are silly until they release 2 per class. I'm not saying its not cool to have the options of using both, just the overall idea of it is kind of weird. You can either be your classes jack-of-all-your-classes-trades, or you can do your classes specialty. Just seems weird.

Adding a second class, however, will make it feel right. You have your class, and your class has two specialties, each being quite similar to the base class but just different enough to give it that edge in party play. I can't put my finger on it, but something feels more right to me about that.

For example ->

Archer -> Bard (Thm/Cnj abilities) and Ranger (Mrd and...Lnc? Abilities) + new 5 Rng specific.
Lancer -> Dragoon (Pgl/Arc) and Um, Dancer (Gld/Cnj)
Thaumaturge -> Blm (Pgl/Arc) and Dark Knight? (Gld/Mrd)

Except Drk's would be using staves and wands... Okay, I don't know, but its possible.