I know it may be a bit early to answer this but from everyones experience using the jobs so far, what would you like to see or think is likely? I've only played Corsair so far so I won't discuss the others but I would personally like to see something that lowers bust a little. Maybe have it lower the duration bust is on or lower the chance of a bust occuring (though I don't know how that one could be done).
And please, don't start listing out dream sets of gear, everyone expects the innevitable HP+xx, MP+xx, Random Stat+x etc so just go for any esoteric ones you can think of.