I'm sure this will come in update notes like they always have.

That being said, I think it's safe to assume that they will continue the current trend:
WAR: heavy hitting and unbelievably high tp gain, no real defense and stupid high enmity gain.
MNK: high dps but slower tp gain, defensive.
WHM: cure better than thou
BLM: nuke better than thou
RDM: debuff better than thou
THF: TH better than thou
PLD: lol
DRK: I assume they'll continue to try to buff both sides of DRK, damage and magic, although probably to no avail.
BST: hard to say since nothing has really been added to bst but stronger jug pets
BRD: can't go wrong with capping haste, so no matter what SE does unless RDM gets Haste II for 40%+ haste SE doesn't really need to give anything to BRD to be able to keep it's place in parties.
RNG: increase damage output to offset the loss of no haste. rng TH shot was unforseen, maybe they will add more to that
SAM: increase SC and MB damage from their SC i assume. Maybe native regain?
NIN: hard to say, they've had some pretty substantial upgrades since 75. Reduce TP gain more maybe.
DRG: more heavy hitting but no defensive side. updates to the forced breath abilities maybe
SMN: really needs ALOT to make it comparative to any other job atm, and SE seems to be giving it nothing but trash and niceties that aren't really needed.
BLU: this job has a lot already, heavy nuke damage, heavy physical spell damage, and more MP efficient (and more powerful) cures than both RDM and SCH atm. It could use a new head butt though.
COR: has gotten quite a bit since 75, although it's still nothing compared to BRD.
PUP: lol
SCH: has gotten a lot since 75, a lot more buffing and nuking power but has strayed away from the curing side. this might be it's direction
DNC: needs waltz recast reduction. Maybe SE will help them out in that department D:

anyway speculation based off of how SE has handled things since 75.